116 LIST OF FISH. 



the velum of the upper-jaw has a straight, deeply fringed border, 

 behind it a second deeply excavated velum. In the under-jaw 

 generally behind the teeth, a papilla. 



Trygon, Adamson. Cuv. Reg. An. 2 ed. ii. 399. Mull. <$• Henle, 

 Mag. Nat. Hist. ii. 90, 1838. Plagiost. 158. Swains. Cab. 

 Cycl. ii. 314. 



Trigonoliatus, Blainv. Bull. Soc. Phil. 121, 1816. 



Dasybatus, Rajin. Caratt. 1810. 



* Tail wholly finless. 



Himantura, Mull, if Henle, Mag. Nat. Hist. ii. 90, 1838. 

 Trigon (§ 3), Cuv. Reg. An. 2 ed. ii. 400. 



1. Trygon Uarnak. 



Trygon Uarnak, Mull, fy Henle, Plag. 158. 



Raja Omnes Scherit, Forsk. Descr. 918, n. 16.6. Linn. Gmel. 1509. 



Raja Arnak (Trygon omescherit), Rupp. Atlas, 51. 



Pastinachus Uarnak, Rupp. Chondropt. 9, t. 19, f. 2. 



Trigon Russellii, Gray fy Hardw. Illustr. 100. 



Trigon, Hardw. Icon. ined. 88, 91. 



Raja Uarnak, Forsk. Descr. 



Trygon Russelli, Gray Sr Hardw. Illustr. Ind. Zool. t. 100. 



Hab. — Indian and Red Seas. 



a. Stuffed. Red Sea. From Dr. Riippell's collection. 



b, c. Stuffed. (Var.) Madras. Presented by T. C. Jerdon, Esq. 



2. Trygon Gerrardi. 



Body rhomboidal, snout projecting, attenuated. Pectoral-tins 

 rounded, subangular, the transverse diameter, rather greater than 

 the distance between the tip of the snout, and the end of the anal 

 rays ; upper surface quite smooth, with the exception of three very 

 small, and one larger, oblong, osseous, tubercles, in the centre of the 

 dorsal line. Tail smooth, round, tapering to the end in a very fine 

 point, about four times the length of the body, with a finely serrated 

 spine, which is situated about three inches from its insertion. The 

 general colour in the stuffed specimen, is a uniform pale brown with 

 about sixty-five distinct white rings upon the tail. 



