ZOOLOGY. 645 



toes of the anterior feet surrounded by a common skin ; 

 no auditory conchs ; posteriorly two udders. All live in 

 the sea. 



It is hardly necessary, in speaking of the Whales, to 

 direct attention to their monstrously-developed osseous 

 system and large fleshy tongue, as also to their corre- 

 spondence with Fishes in the entire form, manner of liv- 

 ing, and imperfect nose. Their head is still confluent 

 with the neck, the teeth are horny plates of coalesced 

 hairs, or uniform simple points, as in Fishes. Most of 

 them have even dorsal fins ; the two udders are hardly 

 separated from the sexual parts. 



Fam. 11. Reptilian Thricozoa, Piys. 



Four feet with hoofs ; canines and mostly also incisors ; 

 stomach simple, do not ruminate Nylghau, Pig, Ele- 

 phant, Rhinoceros, Horse. These animals love the 

 marshes, and are through their mode of living, as also 

 their form, similar to the larger Reptiles ; or, in other 

 words, through their colossal skeleton, with prepon- 

 derating muscular mass, they are Myozoa, through the 

 proboscis or snout, Rhiuozoa. 



Fam. 12. Ornithic TJiricozoa, Ruminants. 



Toes bifid, surrounded by a hoof; above there are 

 rarely incisor and canine teeth ; udders behind ; stomach 

 fourfold ; they ruminate. The horn-formation indicates 

 a relationship with feathers ; the want of incisor teeth, 

 large ears, and timidity of disposition that of the family 

 with the class of Birds. 



Both families enter into connexion with the Whales 

 through the size of their body, the structure of their feet, 

 form of the head and disposition towards water and mud. 

 They are quadrupedal Whales, which have come out of 

 the water, and adopted a manner of living like the Am- 

 phibious Reptiles and Grallatorial Birds. 



Order 5 . ^Estk esio- Thricozoa Ungu icula ta . 



3571. Here for the first time an equiponderance of 

 the sensorial organs makes its appearance and along with 

 it therefore a resemblance between the animals, which is 



