320 



CLASSmCATIOX OF FISHES_, ETC. 



sharp prickles or spinous 

 tubercles ; tail destitute 

 of a serrated spine^ but 

 bearing two small dorsal 

 fins close to the caudal fin^ 

 which is nearly obsolete. 



R. clavata, Yar. iL 436. 



rubra? (fig. 99.) 



Anacaxthus Ehrenh. Ge- 

 neral structure of Pas- 

 tinaca_, but there is 

 neither spine nor fin upon 

 the tail. 



A. orbicularis (?) Bl. 

 Sch. 360. 



2. ScBFAM. PTEROCEPHALIX/E. Eagle Rays. 

 Pectoral fins distinct from the head and snout, which 

 they do not surround as in the last subfamily ; breadth 

 of the body greater than its length ; caudal spine small 

 or wanting ; a small dorsal at the base of the tail, 

 which is long and always naked. 



Myliobates Cuv. Head prominent, protruding beyond 

 the pectorals ; tail excessively long. 



31. aquila. Duhamel, ii. pi. 10. 



Rhixoptera KiM. Muzzle deeply emarginate, or 

 divided into two short lobes, beneath which are some- 

 times two others ; mouth placed beneath ; teeth 

 small, tuberculated and pointed; tail short; basal spine. 

 R. quadrilobata Le Sueur. Am. Tr. i. p. 44. pi. 30. 



Ceratoptera M. and 

 H. {fig. 100.) Re- 

 sembling the last, but ^ 

 the two lobes assume ^ 

 the appearance and of- 

 fice of fins; head trun- 

 cate ; mouth terminal ; "U_^^'*. 

 teeth resembling scales or leaves. 



C. Lesueurii Sob. Les. Am. Tr. i. p. 115. f. 6. 



