312 ON THE DERMAL ARMOUR OF JACARE AND CAIMAN 
In the typical specimens of C. marginatus and C. suchus of-Geoffroy 
St.-Hilaire, the premaxillo-maxillary suture extends back to the level 
of the seventh tooth. 
Mr. Busk has furthermore pointed out to me the existence of 
another American species of Crocodile—C. Moreletti?, which has been 
described by M. Auguste Duméril in his “ Description des Reptiles 
nouveaux ou imparfaitement connus,” &c., ‘Archives du Muséum,’ 
t. vi, 1852. 
This species inhabits lake Flores, in Yucatan ; and it is said by 
M. Duméril to approach C. Americanus, from which it differs in the 
proportions of the skull and in the characters of the dermal armour. 
June 2158t, 1859. 
