Ino.1324. ELASMOBRANCIIIATE fishes— JORDAN A^D FOWLER. (361 



21 in disk, and anterior margins of disk, concave; eyes veiy small, 

 slightly elevated, and about equal to 5^ in interorl)ital space; nos- 

 trils large, conHuent, except for thick cartilaginous frenum, and 

 with edges of flap fringed; mouth small, about l.'r in space between 

 nostrils, and 4f in snout; teeth in somewhat roughened, pavement- 

 like patches in jaws; interorbital space concave in middle, elevated 

 a little on l)oth sides, and equal to 3 in snout. Spiracles very large, 

 rounded, and equal to 2^ eye diameters. Gill-openings moderately 

 small. 



Body entirely smooth, with exception of upper surface of tail behind 

 spine, where it is roughjened. 



Base of ventral about If in interorbital space; tail very long and 

 slender, greatly exceeding length of disk; width of tail at base, 2i in 

 interorbital space; spines on upper part of tail, less than interorbital 

 space, sharp, slender, serrate on both of outer edges, and insei'ted 

 about tirst tifth the length of tail; rather low keels on tail, one above 

 short, and behind spine, the lower nuicli longer. 



Color in alcohol, brown above, more or less uniform, and below, 

 whitish. 



Length, 29^ inches. 



This description from a specimen from Kobe. 



in a young specimen, with two caudal spines, the eves are larger, the 

 tail is smooth and with keels long, and the color darker aliove, and 

 more or less mottled indistinctly. 



Coasts of flapan and southwaid, known })y the long snout. Our 

 specimens from Tokyo, Kobe, Wakanoura, Onomichi, and Hiroshima. 



[ziKj-ei^ the Japanese name.) 



50. DASYATIS GERRARDI (Gray). 



Trijgon gcrrard'i Gray, Chondropt., 1S51, p. 116; India. — Gi-xtiiek. Cat. Fish, 



VIII, 1870, p. 474; Japan, East Indies. 

 T/V/r/o?; ;/mcr?n-H.s Bleeker, Verb. Bat. Gen., XXIV, 1852, Flag., p. 74; Java, 



Sumatra.— DuMERiL, Elasniobranclies, 1870, p. 588 (after Bleeker). 



Disk broader than long. Snout rather obtuse, margins foi-ming an 

 obtuse angle. One or more largo tul)ercles in center of "back, round 

 which, or in front of which, generally smaller tubercles are gi-ouped. 

 forming a .small patch or short band, and not extending beyond central 

 portion of disk. Tail without cutaneous fold, exceedingly long and 

 slender, al)out thrice as long as disk, without tubercles at l)ase. Color 

 brown, with round, yellowish spots, limited to posterior parts in 

 young examples, which have tail ornamented with alternat(> brown 

 and yellow rings, ((xiinther.) 



India, East Indies, and a half-grown specimen recorded from Japan 

 by Dr. Giinther. We have seen no Japanese specimens. A related 



