76 REPORT OF NEW JERSEY STATE MUSEUM. 
Genus UroLopuus Miller and Henle. 
The Round Sting Rays. 
Urolophus jamaicensis (Cuvier). 
i 
‘ 
Membranous flap from above upper posterior portion of orbit 
forms broad cover for spiracle, quite as large as spiracle, rounded 
above and produced in an acute angle extending behind opening. 
Spiracular opening an elongate slot, and valve well developed. 
Very light olivaceous freckled with brown. Posterior half of tail 
obscurely ringed with brown and lighter color. Length 5 inches. 
New Jersey. (Garman. ) 
Known from our coast by the above described foetus, No. 
8,184, United States National Museum. | 
Urolophus torpedinus Garman, Proc. U. $. Nat. Mus., VIII, 
1885, p. 41. 
Genus Dasysatus Walbaum. 
The Sting Rays. 
Key to the Species. 
a. Tail with wing-like expansion below only; adult with stout bucklers on 
back and tail; tail rough, more than twice length of disk. CENTROURA 
aa. Tail with narrow keel or expansion both above and below. 
b. Tail with wing-like expansion below, simply keeled above; 3 series 
of tubercles on shoulder. . HASTATA 
bb. Tail with wing-like expansion above and below, Jatter larger; skin 
nearly or quite smooth in adult. SAY 
Dasybatus centroura (Mitchill). 
Stingaree. Sting Ray. Devil Fish. Pigeon Sting Ray. 
Distinguished from all our other species by the presence of a 
keel or wing-like expansion on the lower surface of the tail only. 
This is the common species about Cape May. Some stings are 
