872 ON THE FISHES OF SEYCHELLES. [Nov. 14, 



large as the others, but with a circular or oval base. Underside 

 smooth. 



Colour above yellowish green ; below white. — A. Dum. 



Hub. Seychelles ; Indian Ocean. 



209. Trygon uarnak, Forsk. 



The specimen obtained at Seychelles differed only from that found 

 at Zanzibar in having much smaller tubercles on the median region 

 of the back, and in having the upper surface immaculate. 



210. Hypolophus sephen. 



Raja sephen, Forsk. p. 17 ; Russell, i. p. 2, pi. 3. 



Trygon sephen, Riipp. Atlas, Fische, p. 52. 



T.forskalii, Riipp. ib. p. 33, pi. 13. f. 2. 



Hypolophus sephen, Miill. & Henle, Flag. p. 170; Dum. Hist. 

 Poiss. i. p. 616. 



Disk rhomboidal, broader than long, the edge almost straight or 

 slightly convex ; angles rounded, except the anterior, which is very 

 obtuse. Ventrals united on the median line ; the anterior angle 

 rounded, the exterior one sharp. Tail about twice and a half as long 

 as dist, depressed as far as the spine, below which commences a cu- 

 taneous fold, which occupies about a third of the lower edge. Supe- 

 rior median region from head to tail covered with scales closely placed 

 together. On the middle of the scapular region there are three 

 tubercles much larger than the others. 



Colour above of a reddish brown, except the scaly portion, which 

 is leaden grey. Lower parts light ; caudal fin dark. — A. Dum. 



Hab. Seychelles; Red Sea ; Indian Ocean. 



211. iExOBATIS NARINARI. 



Narinari brasiliensibus, Marcgrav, Hist. ver. Natur. Brasil. in 

 Piso Hist. Nat. Brasil. pp. 1/5, 1/6. 



Raja quinqueaculeata, Quoy & Gaim. Voy. Freyc. p. 200, pi. 43. 

 f. 3. 



Hel tenkee, Russell, i. pi. 18. 



Myobatis celtenkee, Riipp. N. W. Fische, p. 70, pi. 19. f . 3 (teeth) 



Stoasodon narinari. Cant. Mai. Fish. p. 1416. 



^tobatis narinari, Mull. & Henle, Flag. p. 1/9; Dum. Hist. 

 Poiss. i. p. 641. 



Disk twice as broad as long, the anterior edges a little convex, the 

 posterior ones concave. Anterior angle pointed, posterior one 

 rounded. Snout with an obtuse prominence, broader than long. 

 Lobes of nasal valvule broad, rounded and toothed on their free 

 edges. Dental plate on lower jaw curved, prominent. Caudal fin 

 commencing on the level of the extremity of the insertion of the 

 ventrals. Tail three or four times the length of disk. 



Colour brown, with round white spots edged with black distri- 

 buted irregularly over the back. Lower side white. 



Hab. Sevchelles ; Brazil ; Red Sea ; Indian Ocean. 



