CLASS REPTILIA. 



Ichthyosaurus Platyodon, Conybeare, teeth compressed. 

 Cuv. Os. Fos. t. 28. f. 4, 5. 



Ichthyosaurus Teiiuirostris , Conybeare, Cuv. Os. Fos. 

 t. 29. f. 8, 9. 



Ichhyosaurus Intermedius, Cuv. Os. Fos. t. 29. f. 2, 5. 



Ichthyosaurus Latifrons, Koenig. Icon. Sect. t. f. ined. 

 Mus. Brit. 



Ichthyosaurus Grandipes, Sharp. Geol. Trans. 1830. 



Gen. 2. Plesiosauhus, Conybeare. 

 The head small ; neck very long, of many vertebrae ; the 

 teeth placed in pits. 



For the anatomy of this genus, consult Conybeare, Geolog. 

 Trans, and Cuv. Os. Fos. v. 



Plesiosarus Dolichodeirus, Conybeare, Geolog. Trans. Cuv. 



Os. Fos. V. t. 31 and 32. f. J , 2, &c. Lyme Regis. 



Plesiosaurus Recentior, Conybeare, Kimmeridge. 

 Plesiosaurus Carinatus, Cuv. Os. Fos. v. ^dQ. 

 Plesiosaurus Aiixois, Cuv. L. c. v. 486. 

 Plesiosaurus Pentagonus, Cuv. 

 Plesiosaurus Trigonus, Cuv. 



Gen. 3. Saurocephalus, Harlan. Saurodon, Hay. 

 Teeth like incisors, placed in pits with a regular hole on 

 the inner edge of the Alveola. 



Saurocephalus lanciformis. Hay. Amer. Phil. Trans, y. 

 1. 16. Saurocephalus, Leanus, 1. c. t. 16. 



Section II. Squamata. 



Tongue free, organs of generation double, ossa quadrata 

 separated from the skull. 



Order I. Sauri. 



Mouth not dilatatile, skin covered with various unequal scales. 



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