3. nniNOBATUs. 443 



3. Bhinobatus en^anulatus. 



Rhinobatus rhinobatus, Bl. Schn. p. 353. 



grarnlatus, Ctiv. It^ffne Atiim. ; Mull. Sf Henle, p. 117, pi. 38; 



Blyth, Jom-n. As. Sue. Bengal, 1800, xxix. p. 30; JJumcril. 



Elasmobr. p. 493. 

 armatus. Gray, Ind. Zool. c. fig. ; Mull, i^ Ilcnle, p. 119 ; Blcek 



Verh. Bat. Gen. xxiv. Flag. p. 60, or Nat. Tyds. Ned. Ind. iii 



p. 85 ; Du77ieril, I. c. p. 494. 

 typus, B'^nnett, in Life of Raffies, p. 094. 



Scarcely distinct from Rh. Jialavi. 



Anterior nasal valve not dilated laterally. Snout produced, the 

 distance between the outer angles of the nostrils being contained 

 about once and two-thirds in that between the mouth and the end 

 of the snout. Mouth straight. Back covered with very distinct 

 rough tubercles, and with a series of large compressed spines along 

 the median line. Some distinct spinous tubercles on the orbital 

 margin and on the shoulder. The two rostral ridges are narrow, 

 and united nearly from the base. 



East Indies ; AustraUa. 

 o. Female, 7 feet long : stuffed. India. Presented by J. Miller, 



Esq. 

 b-e Adult and half- grown: stuffed. India. Purchased of Mr. 



Argent. 

 /. Half-grown. India. Presented by General Hardwicke. 

 <j. Young : stuffed. Sumatra. From Sir St. llaffles's Collection. — 



Type of lih. typus. 

 h. Half-grown. (Jai)e York (N. Australia). Purchased of Hr. 



Diimel. 

 i-l. Adult and half-grown : stuffed. 



m. Jaws of a very large example (15 inches broad). India. Pre- 

 sented by T. E. .1. 13r>ileau, Esq. 



This species has been distinguished from Rh. Jialavi by the rela- 

 tive length of the nostrils and the internasal space. I do not think 

 that any value is to be attached to slight differences of this kind, 

 and therefore I have attempted to fix these species by the arrange- 

 ment of the rostral ridges and by the difference of the dorsal tuber- 

 cles. However, if these species, Rh. ohtusus included, had not been 

 distinguished by my predecessors, I should have preferred to regard 

 them as one only. 



Rhinobatus philippi, Miill. & Henle, p. 119, pi. 39, docs not ap- 

 pear to be specifically distinct from Rh. granulatus. 



4. Rhinobatus obtusus. 



3Iull. Sf IIiiilc, p. 122, pi. 37. fig. 2 ; Blyth, Journ. As. Soc. Beny. 

 1 800, xxix. p. 37 ; JDumeril, Elasmobr. p. 493. 



Scarcely distinct from Rh. halavi. 



Anterior nasal valve not dilated laterally. Snout somewhat ob- 

 tuse, the distance between the outer angles of the nostrils being 



