THE FISHES OF NEW JERSEY. 85 
Genus ACIPENSER Linnzus. 
The Sturgeons. 
Key to the species. 
a. Space between dorsal and lateral shields with stellate plates of rather 
large size in 5 to IO series. STURIO 
aa. Space between dorsal and lateral shields with minute spinules in very 
many series. BREVIROSTRUM 
Acipenser sturio Linnzus. 
Sturgeon. Mamoose. Mamouche. Moose. 
Head about 374; depth about 7; D. 38; A. 23; snout nearly 
2 in head; width of mouth 5%; inierorbital space 3°/,; height 

Sturgeon. Acipenser sturio Linneus. 
of dorsal along front edge 3; of anal 3; pectoral 214; ventral 
475; length of caudal peduncle 324; eye 3% over interorbital 
space; lower lobe of caudal 2%% in its length. Snout sharp, 
longer than rest of head. Eye a little elongate. Barbels a little 
nearer mouth than tip of snout. Nostrils near together in front 
of eye. Gill-rakers short knobs. Shields not striate strongly, 12 
before dorsal, 28 in lateral line and 11 between pectoral and ven- 
tral. Skin roughened. Dorsal far back, a little before anal. Cau- 
dal ending in a long slender point, lower lobe rounded. Pectoral 
broad, reaching about one-third of space to ventral. Ventral 
inserted about last third in space between gill-opening and origin 
of lower caudal lobe. Olivaceous-gray, paler below. Length 
11'4 inches. May of 1898. Riverton, in the Delaware. 
Usually in the Delaware and fairly abundant, though I have 
never observed them above Trenton. The river fishermen still 
