LIST OF FISH. ]23 



4. Dasyatis maclura. 



Trygon maclura, Lesueur, Phil. Journ. i. 41. Cuv. Reg. An. 2 ed. 



ii. 400. 

 Pastinaca maclura, Be Kay, Nat. Hist, of New York, 375, pi. 65, 



f. 213 (female), pt. 1. Zool. 1842. 

 Pteroplatea maclura, Mull. Sf Henle, Plag. 169. 



Hab. — North America. 



4. HYPOLOPHUS. 



Body formed as in Trygon. The tail with a high inferior fin, 

 which as in Trygon does not reach tbe end of the tail. The upper- 

 fin wanting. It differs from Trygon principally in the peculiar 

 form of the mouth and the teeth. The under-jaw projects forward 

 in the middle, and on each side of the point there is a dish -shaped 

 concavity. The edge of the upper-jaw is much deeper in the mid- 

 dle ; at the point of the unde^-jaw it bulges, and on the side is very 

 convex. The teeth are paved, hexagonal, broader than long ; iii 

 the upper-jaw in the middle small, at the side large ; in the under- 

 jaw seemingly equally large, but towards the outermost smaller. 



Hypolophus, Mull, fy Henle, Mag. Nat. Hist. 90, 1838. Plagiost. 



170. 

 Trygon (§ 2), Cuv. Reg. An. 2 ed. ii. 399. 



1. Hypolophus Sephen. Pearled Ray. 



Raja Sephen, Forsk. Bescr. 17. Lace" p. i. 123. Block, Sehneid. 



364. 

 Pearled Ray, Shaiv, Gen. Zool. 288. 

 Trygon Sephen, Cuv. Reg. An. 2ed. ii. 399. Riipp. Atlas. 52. 



Riipp. Wirb. 19, f. 5 (teeth). Hardio. Icon. ined. 92. 

 Trygon Forskalii, Riipp. Atlas, 53, 13, 2 

 Hypolophus Sephen, Mull. §• Henle, Plag. 170. 

 Var. ? Wolga tenkee, Russ. 3. 



Hab. — Indian Ocean. 

 a. Stuffed. 

 6. Stuffed. 



c. Stuffed. India. Presented by J. C. Jerdon, Esq., M.D. 



d, e. Stuffed. India. From Mr. Warwick's collection. 



M2 



