19. UKOLOPHUS. 485 



19. UROLOPHUS. 



Urolophus et Trygonoptera, Mull. ^ Henle. 



Tail of moderate length, with a distinct rayed terminal fin, armed 

 with a serrated spine, without or with a rudimentary dorsal fin. 

 Pectorals united in front. Mouth and teeth as in Tryyon. 



Australian and Caribbean seas. 



a. No dorsal Jin : Urolophus. 



1. Urolophus cruciatus. 



»" Raja cruciata, Lacep. Ann. Mus. iv. pp. 201, 210, pi. 65. fig. 2. 

 Urolophus aurantiacus, Miill. 4" Henle, p. 1 73, taf. 55. 



ephippiatus, Richards. Voy. Ereb. Sf Terr. Fish. p. 35, pi. 24. 



cruciatus, Thnncril, Elasmohr. p. 626. 



ephippiatus, Dum6ril, I. c. p. 627. 



Disk rather broader than long, the anterior margins being straight, 

 and meeting at an obtuse angle ; snout not projecting. Skin en- 

 tirely smooth. Tail shorter than the disk. Yellowish, uniform or 

 with one or three blackish longitudinal bands crossed by others of 

 the same colour. 



Australian seas. 



a. Type of U. ephippiatus. Port Arthur. From the Haslar Col- 

 lection. 



2. Urolophus armatus. 



Midi. Sf Henle, p. 174 ; Dumh-il, Elasmobr. p. 628. 



Disk rather broader than long ; snout rather projecting. Upper 

 parts with small spinelets ; a large tubercle in the centre of the 

 scapulary region. Tail scarcely shorter than the disk. Brown, 

 with numerous black dots. 



New Ireland. 



3. Urolophus torpedinus. 



Pastinaca marina, Shane, Jam. p. 277, pi. 246. fig. 1. 



Trygonobatus torpedinus, Desmar. Ichth. dec. I. p. 6, pi. 1. 



Raja jaaiaicensis, Cuv. Rhjne An. ; Bancroft, Zuol. Journ. v. p. 83 



(Raja sloani). 

 Urolophus torpedinus, 3Iidl. Sf Henle, p. 173, pi. 65 ; Poey, Mem. 



Cub. ii. p. 360 ; Dumeril, Elasmobr. p. 628. 



haUeri, Cooper, Proc. Calif. Ac. Nat. Sc. iii. p. 95. 



Urotrygon mundus, Gill, Proc. Ac. Nat. Sc. Philad. 1863, p. 173. 



Disk ovate, longer than broad. Upper parts with distant, minute 

 spinelets. Tail rather shorter than the disk in adult examples. All 

 the upper parts with numerous yellow, dark-edged ocelli ; sometimes 

 of a more uniform colour. 



West Indies, and Pacific cotists of Central America. 



a, h. Adult and young. Jamaica. Purchased of Mr. Higgins. 

 c-f. Adult and half-grown : skins. Jamaica. Purchased of Mr. 



Parnell. 

 g, h. Adult. "West Indies. 



