60 REPORT OF NEW JERSEY STATE MUSEUM. 
Genus Cynats Gill. 
The Dog Sharks. 
Cynais canis (Mitchill). 
Dog Shark. Dog Sherk. Dog Fish. 
Body long, slender, tapering from dorsal fin back. Caudal 
peduncle a little over half upper caudal lobe. Head rather broad, 
and snout with rounded profile when viewed from above, also 
depressed and sharp. Eye elongate, mouth crescent-shaped, 
small, and with well-developed labial folds. Teeth small, pave- 
ment-like, many-rowed, flat and smooth, and alike in both jaws. 
Spiracle small, just behind eye. Embryo without placenta. First 
dorsal large, close behind pectorals. Second dorsal smaller, 
though larger than anal. Anal behind front of second dorsal. 
Caudal a little less than 4% in rest of body, and its terminal lobe 
about 24 its length. Lower caudal lobe obtuse. Pectoral large, 
obtuse, reaching first third of dorsal. Ventral about half size of 
pectoral. Color nearly uniform pale gray, whiter beneath. 
Length 17 inches. Great Egg Harbor Bay. 
It is said to reach a length of 3 feet and also to sometimes be 
marked with pale spots. Very abundant during warm weather 
in the inlets and along the marshes. It is also abundant in the 
bay at Cape May, according to Mr. H. Walker Hand. Like other 
sharks this one bites well on fish-bait. They also appear to travel 
with the red drum, Scienops ocellatus. Many examples were 
examined from the lower Great Egg Harbor River, which it is 
said not to enter beyond the purely brackish region of tide- 
water. Atlantic City, Avalon, Stone Harbor, Anglesea and Cape 
May. Mr. I. N. DeHaven and myself caught many of these fish 
in the inlet back of Atlantic City one summer, and most all those 
examined had been feeding on crustacea. They took fish-bait 
readily. 
Mustelus canis Baird, 9th An. Rep. Smiths. Inst., 1854, p. 337 
[353].—Abbott, Geol. N. J., 1868, p. 828.—Bean, Bull. U. S. F. 
Com. VALTeS7, p. 152: 
Galeus canis Moore, Bull. U. S. F. Com., XII, 1892, p. 358. 
