Go the Rogue trader book out of the loft.
Other assorted animals that caught my attention are:
Crotalid - space crocodiles
Grox - space large reptile cattle (angry cattle)
Enslaves
Vampire
Wasps that take over your brain, pys.... something
horses
catachian devils and face eaters
ambulls
Lots of almost RPG rules. A huge scenario campaign generator is the best bit. The fluff doesn't sit with cannon fluff very well. Leman Russ wasn't even born until M32.