Random selection from a List and assign fields to variables

I've been looking online for a straight forward answer on this and all of the examples I've tried have not worked for me. I need to randomly select an element from a List and then assign two of the fields to two separate Text components and then assign the third string to a variable that I'll use to modify a filename (for a screenshot of the animal type that are in my List). Here's what I have so far, but I don't know how to do the random part or, once the element is selected assign the fields accordingly.

AnimalDescription.cs

public string name;
public string description;
public string screenshotPrefix;

// Constructor to allocate string values
public AnimalDescription(string newName, string newDescription, string newScreenshotPrefix)
{
    name = newName;
    description = newDescription;
    screenshotPrefix = newScreenshotPrefix;
}

GameSetup.cs

void Start()
{
    List<AnimalDescription> animalDescriptions = new List<AnimalDescription>();

    animalDescriptions.Add(new AnimalDescription(
        // animal name
        "Of the Bear-Ape ARCTOPITHECUS.",
        // animal description
        "There is in America a very deformed beast which the inhabitants call Haut or Hauti, and the Frenchmen, Guenon, " +
        "as big as a great African Munkey. His belly hangeth very low, his head and face like unto a childs, as may be seen by " +
        "this lively picture, and being taken it will fight like a young child. His skin is of an ash-colour, and hairy like a Bear; " +
        "he hath but three claws on a foot, as long as four fingers, and like the thornes of Privet, where-by he climeth up into the " +
        "highest trees, and for the most part liveth of the leaves of a certain tree being of an exceeding height, which the Americans " +
        "call Amahut, and thereof this beast is called Haut. Their tail is about three fingers long, having very little hair there-on; " +
        "I observed, that although it often rained, yet was that beast never wet.",
        // screenshot prefix
        "ARCTOPITHECUS_"
        ));
    animalDescriptions.Add(new AnimalDescription(
        // animal name
        "Of the SIMIVULPA, or Apifb-Fox.",
        // animal description
        "…they have seen a four-footed beast, the forepart like a Fox, and in the hinder part like an Ape, except that it had a mans " +
        "feet, and ears like a Bat, and underneath the common belly, there was a skin like a bag or scrip, where-in she keepeth, lodgeth, " +
        "and carryeth her young ones, until they are able to provide for themselves, without the help of their dam; neither do they come " +
        "forth of that receptacle, except it be to suck milk, or sport themselves, so that the same under-belly is her best remedy against " +
        "the furious Hunters, and other ravening beasts, to preserve her young ones, for she is incredibly swift, running with that carriage " +
        "as if she has no burden. It hath a tail like a Munkey…",
        // screenshot prefix
        "SIMIVULPA_"
        ));
    animalDescriptions.Add(new AnimalDescription(
        // animal name
        "The SCYTHIAN WOLF.",
        // animal description
        "…they have seen a four-footed beast, the forepart like a Fox, and in the hinder part like an Ape, except that it had a mans " +
        "feet, and ears like a Bat, and underneath the common belly, there was a skin like a bag or scrip, where-in she keepeth, lodgeth, " +
        "and carryeth her young ones, until they are able to provide for themselves, without the help of their dam; neither do they come " +
        "forth of that receptacle, except it be to suck milk, or sport themselves, so that the same under-belly is her best remedy against " +
        "the furious Hunters, and other ravening beasts, to preserve her young ones, for she is incredibly swift, running with that carriage " +
        "as if she has no burden. It hath a tail like a Munkey…",
        // screenshot prefix
        "SCYTHIAN_WOLF_"
        ));
    animalDescriptions.Add(new AnimalDescription(
        // animal name
        "Of the TATUS, or Guinean Beast.",
        // animal description
        "This is a four-footed strange Beast, it is naturally covered with a hard shell, divided and interlined like the fins of fishes, " +
        "outwardly seeming buckled to the back like Coat-armor, within which the beast draweth up his body, as a Hedge-hog doth within his " +
        "prickled skin; and therefore I take it to be a Brasilian Hedge-hog. It is not much greater than a little Pig, and by the snout, ears, " +
        "legs, and feet thereof, it seemeth to be of that kind, saving that the snout is a little broader, and shorter than a Pigs, and the " +
        "tail very long like a Lizards or Rats, and one of these being brought into France, did live upon the eating of seeds, and fruits of " +
        "the Gardens, but it appeareth by that picture, or rather the stuffed, which Adriausus Mercellus the Apothecary…that the feet thereof " +
        "are not cloven into two parts like Swine, but rather into many like Dogs, for upon the hinderfeet there are five toes, and upon the " +
        "fore feet four, whereof two are so small that they are scarce visible. The breadth of that same skin was about seven fingers, and the " +
        "length of it two spans, the shell or crust upon the back of it did not reach down unto the rump or tail, but broke off as it were upon " +
        "the hips, some four fingers from the tail.",
        // screenshot prefix
        "TATUS_"
        ));
    animalDescriptions.Add(new AnimalDescription(
        // animal name
        "Of the GULON",
        // animal description
        "This Beast was not known by the Ancients, but hath been since discovered in the Northern parts of the World, and because of the " +
        "voracity thereof, it is called  (Gula)…is thought to be engendered by a Hyena and a Lioness, for the quality it resembleth a Hiena, " +
        "and it is the same which is called (Crocuta;) it is a devouring and an unprofitable creature, having sharper teeth than other creatures. " +
        "Some think it is derived of a Wolf and a Dog, for it is about the bigness of a Dog; it hath the face of Cat, the body and tail of a Fox; " +
        "being black of colour; his feet and nails be most sharp, his skin rusty, the hair very sharp, and it feedeth upon dead carkases. When it " +
        "hath found a dead carcass he eateth thereof so violently, that his belly standeth out like a bell; then he seeketh for some narrow passage " +
        "betwixt two trees, and there draweth through his body, by pressing whereof, he driveth out the meat which he had eaten; and being so emptied " +
        "returneth and devoureth as much as he did before, and goeth again and emptieth himself as in former manner; and so continueth eating and " +
        "emptying till all be eaten.",
        // screenshot prefix
        "GULON_"
        ));
    animalDescriptions.Add(new AnimalDescription(
        // animal name
        "Of the SUCCORATH",
        // animal description
        "…it is of a very deformed shape, and monstrous presence, a great ravener and untamable wilde Beast. When the Hunters that desire her " +
        "skin set upon her, she flyeth very swift, carrying her young ones upon her back, and covering them with her broad tail: Hunters dig " +
        "several pits or great holes in the earth, which they cover with boughs, sticks, and earth, so weakly that if the Beast chance at any " +
        "time to come upon it, she and her young ones fall down into the pit and are taken. This cruel, untamable, impatient, violent, ravening, " +
        "and bloudy beast, perceiving that her natural strength cannot deliver her from the wit and policy of men her hunters, (for being inclosed " +
        "she can never get out again.)…she destroyeth them all with her own teeth; for there was never any of them taken alive…And this is all I " +
        "finde recorded of this most savage Beast.",
        // screenshot prefix
        "SUCCORATH_"
        ));

    RandomizeAnimals();
}

void RandomizeAnimals()
{
    System.Random rand = new System.Random();
}