Fishes of Massachusetts. 531 
teeth in each jaw, smooth on their edges, widely 
separated from each other; the first two rows nearly 
perpendicular, back row recurved; teeth in the 
upper jaw, the larger; in the lower jaw, straighter. 
Five branchial apertures placed vertically ; the first, 
smallest, just before the pectorals. 
The first Dorsal fin is triangular, eleven and a 
quarter inches long, twelve and a quarter inches 
high. 
The second Dorsal is eight inches in front of the 
tail, and twenty inches from the first dorsal ; three 
and a half inches long; three quarters of an inch 
wide. 
The Pectorals are twenty inches high, eleven 
inches long, falciform; at the posterior extremity of 
the fin is a small digitation. 
'The Ventrals are five and a half inches back of 
the dorsal fin; eleven inches long; nine inches 
high. Anus large, between the ventrals. The 
claspers are sixteen and a half inches long from the 
anus; depth at their base, one and a quarter inch. 
The Anal fin is situated about four inches in 
front of the tail, four inches long, one inch high. 
The Caudal fin is composed of two lobes; the 
lower lobe is seven inches long, nine high; the 
upper, falciform, its greatest depth eleven inches, 
six and a half inches in its middle, two and a half 
inches at the extremity ; greatest depth across both 
lobes, sixteen and a half inches. 
The body of the fish is terminated on the back, 
by a semicircular ridge; a depression of two and 
three quarter inches in extent, is seen just back 
