PINNATED QUADRUPEDS. 
ARCTIC WALRUS. 
GENERIC CHARACTER. 
Two great tusks in the upper jaw, pointing downwards. 
Four grinders on both sides, above and below. 
Five palmated toes on each foot. 
SPECIFIC CHARACTER. 
Trichechus Rosmarus. T. dentibus laniards, superioribus exser- 
tis remotis Linn. Syst. Nat. Gmel. 1 . 
p. 5Q. 
Trichechus with distant, exserted tusks. 
Rosmarus. Jonst. Pise. t. 44. 
Equus marinus sive Hippopotamus falso 
dictus. Raj. Quadr. 191. Ellis. 
Hudson, t. 6. f. 3. 
Wallross. Martens Spitsl. 78. t. 1. 
f. B. 
Arctic W alrus. . . Sm. Buff. v. 7- p. 354. pi. 256. Penn. 
Hist. Quadr. 2. p. 266 . pi. 97 . Bew. 
Quadr. p. 467 . Shaw Gen. Zool. 
pi. 68. 
In all transitions from one kind, to the other, there 
is to be found a middle race of animals, that seem 
to partake of the nature of both, and that can pre- 
cisely be referred to neither. This observation is 
strictly true when applied to the walrus, the seal. 
