The Menagerie as far as I know: (major spoilers below)
Goblins: punks in steel armor that can barely hurt you
Kobolds: short little dudes who are similarly ineffective
Rockspiders: The ground spiders you find scattered around. Not terribly exciting.
Molespiders: Nasty spiders
Mindeaters: blue guys who want to suck your blood
?: Second level mindeaters with 'fros
Trolls: Black guys with daggers. They're kinda nasty.
Dragons?: Orange, and annoying
Cyclops: Red, brutish, and not pleasant. They're about 3x your height.
Zombies: white, skeletonish, and they want your body. Watch out.
Revenants: nastier zombies, a darker shade of skin.
Ogres: big, loud, with huge weapons. Easy to kill though.
Death knights: Darth Vader, except their sword is the size of you and glows. Don't mess with these guys.
Earth golems: They look like they're made of stone. Very icky.
Manticores: red gargoyles. Vicious in packs.
Blue dragons: a nastier strain of dragon.
Dark spirits: blue floaty guys who will make mincemeat out of your new suit.
Scurryish thingies: brown, short, found in most caves. A problem in numbers.
Albino freaks?: Greyish clear, taller than you, and wussy. A club.
Liliths: devil bitches, look sorta like Xena.
Minotaurs: Twice your height, dark brown/black stripes, and a scythe bigger than you.
Termites, white: wussy, but annoying. They're long and squusshy.
Termites, red. Duh.
Thivoks: green centaurish beasts.
Oakwasp: buzzy giant mosquitos.
Sea giants: Big, and nasty. Don't mess with these guys.
Head Sea Giant: See above, but nastier.
Grey mages: cloaked, emit glowy thingies.
Blue mages: cloaked, emit green thingies.
Red mages: cloaked, emit red fireballs.
Thief: Black cloak, low face.
Red thief: Red cloak, throws stuff.
The Guardian: Three times taller than you, glowing red eyeballs, two jagged swords, and the ability to thrown lightning. It's hard to miss him.
That's all the stuff I remember off hand.
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Gentile or Jew
O you who turn the wheel and look to windward,
(url="http://"http://www.bigfurrydeal.com")Consider(/url) Phlebas, who was once handsome and tall as you.