130 REPORT OF NEW JERSEY STATE MUSEUM. 
Genus SEMOTILUS Rafinesque. 
The Fall Fishes. 
Key to the species. 
a. Scales large, about 45 in lateral line, and not much crowded anteriorly; 
dorsal without black spot. BULLARIS 
aa. Scales smaller, 45 to 65 in lateral line,.and crowded anteriorly; dorsal 
with a black spot at base of anterior rays. ATROMACULATUS 
Semotilus bullaris (Rafinesque). 
Chub. 
Head 4; depth 334;°D: 11; 7, ‘1; A. m1, 7) 15 scalesieaaim 
lateral line to base of caudal, 3 more on latter; 8 scales obliquely 
back from origin of dorsal to lateral line; 5 scales obliquely 
forward from origin of ventral to lateral line; 20 scales before 
dorsal; snout 3 in head; eye 5; maxillary 3; interorbital space 
244; pectoral 1%4; ventral 134; least depth of caudal peduncle 
234 ; pharyngeal teeth 2, 5—4, 2. Body robust, little compressed. 
Head large, convex, snout bluntly conic, slightly produced be- 
yond mandible. Eye small, ellipsoid, high. Maxillary not quite 
reaching front of eye. Small barbel on maxillary, just above its 
tip, much shorter than pupil. Interorbital space broadly convex. 
Gill-rakers 2 +- 5 short weak denticles. Scales large, striate, not 
crowded in front of dorsal. Lateral line decurved. Dorsal in- 
serted nearer base of caudal than tip of snout. Anal inserted 
nearer origin of ventral than base of caudal. Caudal forked. 
Pectoral reaching 24 of space to ventral. Ventral before dorsal 
and reaching nearly 24 of space to anal. Ground-color pure 
silver-white. Back steel-blue. Cheeks bright rosy. Sides with 
rosy. Dorsal and pectoral fins with crimson. Length 10% 
inches. Trenton. Type of Leucosomus rhotheus Cope. 
A! vigorous active fish reaching a length of 18 inches. It is 
often found about rapids and falls, from which it has earned 
the name fall fish. The large ones occur in rivers or other 
large bodies of fresh-water. Those most likely to be met with 
