MAMMALIA. 1 



base : front-teeth in the lower-jaw &: canine-;reth none: 

 r/iz'n of the male bearded. 



19. Ovis. Horns bellow,, wrinkled, turned backwards and 

 spirally twisted inwards : front-teeth in the lower-jaw 

 8 : canine-teeth none. 



20. Bos. Horns hollow, smooth, turned outwards and 

 forwards, crescent-shaped : front-teeth, in, the lower- 

 juw 8 : canine-teeth none. 



ORDEtl V. 



Front-teeth obtuse, truncate : feet hoofed. 



21. EQLCS. Front-teeth in the Upper-jaw 6, parallel ? 

 in Hie lower-jaw 6, rather projecting : tusks one each 

 side in each jaw r remote from the rest : hoofs un- 

 divided. 



22. Srs. Front-teeth in the upper-jaw 4, converging ; in 

 the lower 6 > projecting : tuajts hi the uj>nrr-jaw 2, 

 rather short; in the lower !^, lonp, and at length 

 exserted : hoofs cloven. 



ORDER VIv ETE. 



With' spiracles, or breathing holes, on the forepart vf the head: 

 feet none : pectoral fins without dates : tail placed hori- 

 zontally. 



23. MONODO-S. Head furnished with one or two long 

 spirally twisted teeth,, projecting straight forwards, 

 like ho rns> through the upper lip: spiracle on the 

 head. 



24. BALJ2NA, Teeth none, instead of which are horny 

 laminai in the upper-jaw : spiracle with a double ori- 

 fice, on the top of the head. 



25. PHYSETER. Teeth visible in the lower-jaSv only : 

 spiracle on the head or snout. 



26. DELPHINUB, Teeth visible in each jaw: spirack on 

 the head. 



