THE FISHES OF NEW JERSEY. 55 
pointed, flattened on anterior surfaces and rounded behind. Lat- 
eral teeth small, compressed, triangular, and so much crowded 
behind as almost to resemble tuberculated molars. On palate a 
rounded patch offering asperities to the hand when moved for- 
ward. Across roof of mouth a strong membranous fold. Nos- 
trils doubly curved, sublateral. Posterior branchial aperture 
farthest from its antecedent. Under a lens the surface exhibits 
numerous minute plates, each with three parallel longitudinal 
elevated lines, producing a roughness when the hand is moved 
towards head. On surface of head four series of punctures on 
each side, commencing nearly opposite posterior margins of or- 
bits, dilating and extending to within an inch of tip of snout. 
Immediately before eyes a large patch of similar punctures ex- 
tending slightly beyond nostrils. On under side of snout a tri- 
angular patch of similar punctures. A regularly curved series 
of punctures from end of carina concurrent with back and ending 
just anterior to origin of first dorsal. All these punctures aper- 
tures of mucous ducts filled with a transparent jelly. Skin at 
posterior bases of dorsal and pectorals eroded by parasite. First 
dorsal quadrilateral, higher than long, upper margin excavated, 
and lower angle pointed. Second dorsal very small, oblong, 
lower angle behind ending in a prolonged point. Anal small, 
similar to second dorsal, slightly posterior or midway between 
ventral and base of caudal. Caudal deeply lunate, lobes slightly 
unequal. Pectoral long, pointed, deeply concave on posterior 
margin, base small. Ventral quadrilateral, and length of base 
twice the height. Color in life said to be deep bottle-green, after- 
wards generally dark slaty, lighter beneath. Tongue mottled 
with black. Length 10 feet 2 inches. In the harbor of New 
York, October, 1840, and near the lightships stationed off Sandy 
Hook. (DeKay.) 
I have no other records or information concerning this shark 
Isuropsis dekayt Gill, An. Lyc. Nat. Hist. New York, VII, 
Dec. 1861, p. 409. Based on Lamna punctata DeKay, N. Y. 
Fauna, Zool., III, 1842, p. 352, Pl. 63, figs. 206—7. 
? Isuropsis glaucus Abbott, Geol. N. J., 1868, p. 828. 
