440 UUI>OilATIXJ.U. 



Fam. 2. RHINOBATIDiE. 



Tail strong and long, with two well -developed 

 dorsal fins ; a caudal and a longitudinal fold on each 

 side. Disk not excessively dilated, the rayed portion 

 of the pectoral fins not being continued to the snout. 

 No electric organ. 



2. RHYNCHOBATUS. 



Rhina, sp., et Rhinobatus, sp», Bl. ScJin. 

 Rhiria ct Rliynchobatus, MiiUin- iif Henle. 

 Rhanipliobatis et Rhynchobatus, GUI. 



Body depressed. Pectoral fins with the front margin quite free, 

 not extending to the head. Gill-openings inferior, inwards of the 

 base of the pectoral, narrow. Spiracles wide, behind the eye. No 

 nictitating membrane. Nostrils inferior, oblique, wide slits. Teeth 

 obtuse, granular, the dental surfaces of the jaws being undulated. 

 Dorsal fins without spine, the first opposite to the ventrals. Caudal 

 with the lower lobe well developed. 



Indian Ocean and archipelago to China. 



1. Rhynchobatus ancylostomus. 



L'Endormie {Seychelles). 



Rhhia ancylostomus, Bl. Schn. p. 352, tab. 72 ; Gray, III. Ind. Zool. ; 

 Agass. I'oiss. Foss. iii. p. 82, tab. II. figs. 3 & 4 ; Rkliards. Ichth. 

 Chirh p. lOo; Miill. 4" Henle, p. 110; Owen, Odwitogr. pi. 2.'> ; 

 Cantor, Mai. Fish. p. 409; Blcek. Verh. Bat. Gen. xxiv. Flay. 

 p. 6i3. 

 Rliampliobatis ancylostomus, Gill, Ann. Lye. Nat. Hist. New York, 

 1801, vii. p. 408. 

 Snout very broad and obtuse, with semicircular outline. Largo 

 compressed tubercles form longitudinal ridges, one on each, side of 

 the upper part of the head, and one on the median line-of the trunk. 

 An incomplete series of smaller tubercles round the front margin of 

 the eye and below the spiracle. Two short scries of small tubercles 

 on each side of the trunk may be regarded as the continuations of 

 those on the head. Dental surface of both jaws deeply undulated. 

 Ea.^t Indies. 



u. Adult male: stuffed, feet long. Madras. Tresented by T. C. 



Jerdon, Est]. 

 b. Young: stuffed. Cliiiia. Presented by J. 1^ Reeves, Esq. 



