I30 REPORT OF NEW JERSEY STATE :^IUSEUM. 



Genus Skaiotilus Rafinesque. 

 The Fall Fishes. 

 Key to the species. y 



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 



w^ith a black spot at base of anterior rays. atromaculatus 



Semotilus bullaris (Rafinesque). 



Chub. 



Head 4; depth 3^^; D. iii, 7, i; A. iii, 7, i; scales 43 in 

 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 

 2^; pectoral i^ ; ventral ij4; least depth of caudal peduncle 

 2j4 ; phar3rngeal 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 3 + 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 % of space to ventral. Ventral before dorsal 

 and reaching nearly J^ 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 loj^ 

 inches; Trenton. Type of Leucosomus rhotheiis 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 



