80 THE SHORE FISHES. 
DASYATIDAE. 
Urolophus halleri Coopsr. 
Proc. Cal. Acad. Sci., 1863, 3, p.95. Jorpan & EveRMANN, Bull. 47, U.S. Nat. Mus., 1896, pt. 1, p. 80. 
A single example, a male, No. 3335, 12 inches long from Acapulco. 4 
Snout 3 disc; spinous portion of tail longer than snout to ventrals; about. 
eighteen retrorse barbs, these more widely separated than in U. aspidurus; eyes” 
about as large as spiracles; caudal blunt and rounded. 
Urolophus aspidurus Jorpan & GILBERT. 
Bull. U. S. Fish Comm., 1881, 1, p. 307. Jorpan & Evermann, Bull. 47, U.S. Nat. Mus., 1896, pt. 1 liye 
p. 81. ¥ 
One specimen, No. 3137, 114 inches long from Bay of Panama. 
Urolophus rogersi Jonpan & Srarks. 
Proce. Cal. Acad. Sci., 1895, ser. 2, 5, p. 388. 
A single individual, No. 3376, 113 inches long from Acapulco. Distance 
from tip of snout to a line across back from posterior base of pectorals 1.22 in. 
width of disc; tail, measured from vent 1.17 in width of disc; distance from ven t 
to anterior insertion of caudal spine 2.5 in width of disc; distance from anteri or 
insertion of caudal spine 2.30 in width of disc; length of spine 1.33 in distance 
from posterior edge of eye to tip of snout; twelve retrorse barbs on side of caudal = 
spine; caudal rounded; tubercles with a stellate base; five enlarged tubercles 
on median line of back in humeral region; three smaller ones near the base of 
tail; scattered small prickles on the interorbital space, along side of back, — 
posterior margin of pectorals, tip of snout, becoming numerous on the tail; 
upper lip fimbriated. 
CLUPEIDAE. 
Sardinella thrissina (Jorpan & GILBERT). Ww 
JorpaNn & EverMANN, Bull. 47, U. S. Nat. Mus., 1896, pt. 1, p. 430. 
Clupea thrissina JorvAN & GiLBERT, Proc. U. S. Nat. Mus., 1882, 5, p. 353. 
Twelve specimens, 14 to 2% inches long from Acapuleo. M. C. Z. 29430 
(3 specimens). ' 
Four specimens 1§ to 1 inches long from Toboguilla Island, October 28, — 
1904. 
In these individuals the edges of the scales are crenate, scales 17 +12 or 13; 
dorsal II, 15; anal II, 14 or 15. 7 
