RAlDiE. 



TBYGONINiE. 



319 



Pristis Latham, (fig. QS.) Teeth small^ rounded^ and 

 extending over the tip. 



P. antiquorum Lath. 



semi-sagittatus. Russ. pi. 13. 



Fa3iily 2. RAIDM. Rays, Skates, ThornbacJcs. 



Head generally surrounded by the pectoral fins^ the 

 margins of which form a continuous line with the snout. 



1. SuBFAM. TRYGONIN^. Sting Rays. 



Head surrounded by the pectorals ; tail armed with 

 spines or prickles ; eyes far removed from the circum- 

 ference. 



Tbygon Antiq. Body smooth ; tail attenuated^ the tip 

 acute^ with narrow fins above or below^ the base 

 armed with a prolonged spine, serrated or smooth. 

 T. Forskalii. Riipp. pi, 13. fig. 2. 



lymnce. 



lb. fig. 1. 



Pastinaca Antiq. Resembling Trygon, but the tail is 



nakedj having one or two spines, but without any 



perceptible fin either above or below. 



P. olivacea Sw. Yarrell, ii. 442. Bloch, pi. 82. 

 brevicauda Sw. Russ. i. pi. 5. dorsalis Sw. Russ. 1. pi. 4. 



Pteroplatea M. and H. Breadth of the body and 

 pectorals greater than the length ; tail very short, with 

 or without spines, but always without fins. 

 P. annulata Siv. Russ. i. pi. 6. 



Raia Linn. (fig. QQ.) Body in general beset with 



