G44 PROCEEDING F< OF THE NATIONAL MUSEUM. vol. xxvi.J 



East Indies; a single specimen was obtained at Kinkwazan, an island 

 off Matsushinia Bay, in September, 1900, by Professor Mitsukuri, 

 (<^^'j/ct;/\ob, undulate; oroyun', mouth.) 



34. RHYNCHOBATUS Mliller and Henle. 

 Rhynchohatus Mxii^hER and Henle, Plagiostoiuen, 188S, p. Ill (L-rrix.) 



This genus differs from jRhina chieflj^ in the form of the snout, which 

 is produced and pointed as usual in Rhinobattis. The tubercles on the 

 back are arranged much as in Ehma, but are very small. 



(pvyx^s^ snout; ftatog^ skate.) 



36. RHYNCHOBATUS DJIDDENSIS (ForskSl). 



I 



TONGARI (SHARP-POINTED RAY); KOTAINOZU; SAKATAZAME; KASUKA; 

 SUKINOSAKI (PLOW-POINT); SAKAFUTE; SUKINOSAZAKI. 



Raja djidden^-h Forskal, Descr. Anim., II, 1775, p. 15, figs. 1, 2; Djidda, Red 

 Sea. 



lihynchobatus djeddensis Gunther, Cat. Fish, VIII, 1870, p. 441; Red Sea, Zanzi- 

 bar, Seychelles, Sumatra, India. ] 



Rhinobatus Isevis Bloch and Schneider, Syst. Ichth., 1801, p. 354, pi. lxxi; Coro-' 

 mandel. — Schlegel, Fauna Japoniea, Poiss., 1850, p. 306, pi. cxxxix; 

 Nagasaki, in open sea. 



Rhyncobatus la'vis DiniERih, Elasmobranches, 1870, p. 484; Malabar, Pondicherry. 



RJiyncobatuH duhamdi Blainville, Fauna Fran^aise, 1828, p. 48 (after Duhamel). 



Snout elongated, distance between mouth and end of snout equal* 

 one-fourth to one-tifth of entire length, excluding caudal fin, shortest 

 in adults; eyes rather large; teeth oval, wider than broad, with a hori- 

 zontal cusp across center of each, 40- 42—40- 42, twenty to twenty-five 

 vertical rows across the middle of jaws, and dental plate with a cen-i 

 tral, and a smaller lateral elevation; corresponding emarginations exist 

 in upper jaw. Spiracle close behind eye. Scales minute, of irregulai 

 shapes and sizes, keeled; a niuuber of tubercles, directed l)ackward, 

 exist in rows in some parts of body; a supraorbital row extends from 

 anterior margin of orbit round its upper edge to above spiracle; a 

 second passes from a central point ))etween termination of last twc 

 and proceeds along ])ack to base of first dorsal, tubercles on it much 

 farther apart than in other lines; from slightly l)ehind beginning ol 

 dorsal line of spines, a short, div^erging row on either side, also a row 

 on shoulder, and two or three spines on scapula. Second dorsal begins 

 opposite extremity of first dorsal; smaller than latter fin; its shape 

 the same. Lateral keel begins a little above termination of ventrals. 

 In color, immature specimens dull-gray above, whitish, sometimes 

 tinged with red beneath; a dark or black band on the upper eyelid, 

 and a dark spot beneath on either side of snout; also usually, but not 

 invariably, a black spot at root of pectoral, which may have several 

 small white ones aroiuid it; ])ody, and sometimes pectoral fin, spotted 



