202 FOSSIL REPTILES. 



from Calcutta a specimen exactly according to the above 

 description. 



That the reader may have clearly before him the number 

 of living crocodiles, which it is absolutely necessary he should 

 be in full possession of, for the thorough discrimination of 

 the fossil species ; — we will copy here M. Cuvier's tabular 

 synopsis of them from the '' Ossemens Fossiles." 



Classis. Amphibia. 

 Ordo. Sauri. 

 Genus. Crocodilus. 



Dentes conici, serie simplici ; Lingua carnosa, lata, ori 

 affixa ; Cauda compressa, supreme carinato serrata ; plantse 

 palmatae, aut semipalmatae ; squamae dorsi, ventris, et caudae, 

 latae subquadratae. 



* Alligatores. 



Dente infero utrinque quarto in fossam maxillce superioris 

 recipiendOf plantis semipalmatis. 



1. Crocodilus lucius. 

 Rostro depresso parabolico, scutis nuchae quatuor. 

 Habitat, in America septentrionali. 



2. Crocodilus sclerops, 



Porca transversa inter orbitas, nuchae fasciis osseis quatuor 



cataphracta. 



{Seb. I. t. 104. f. 10. Mediocr.) 



Habitat, in Guyana et Brazili^. 



3. Crocodilus palpebrosus. 

 Palpebris osseis, nuchae fasciis osseis quatuor cataphracta. 

 Habitat, in Guyan^. 



4. Crocodilus trigonatus, 



Palpebris osseis, scutis nuchae irregularibus carinis elevatis 



trigonis. 



{Seb. 1.^.105./. 3.) 



