31. CyPRINIDiE SExMOTILUS. 
221 
testinal canal slioi t. Teeth 2, 5-4, 2, hooked, without masticatory sur- 
face. Scales moderate. Lateral line continuous. Dorsal more or less 
posterior to ventrals. xinal basis short. Species of large size, differing 
from Squalius in the i)resence of a maxillary barbel, {(rrj/xa, banner — 
1. e., dorsal fin; the second part of the word was elsewhere used by 
Eafinesque to mean “spotted’’. 
* Insertion of dorsal fin evidently behind ventrals and notably behind the middle of 
the body ; scales reduced in size and much crowded anteriorly ; a black spot 
at base of dorsal in front. (Semotilus.) 
347. S. corporalis (Mitch.) Putn. — Chub; Horned Dace. 
Body stout, the dorsal outline arched in front of the dorsal, the body 
tapering backward from a point considerably in advance of the dorsal, 
so that the base of that fin is oblique. Head large and heavy, broad 
and rounded above. Snout broad. Mouth broad, oblique, the lower 
jaw slightly included, the upper lip Just below the level of the pupil, 
the maxillary barely reaching the front of the pupil; maxillary bar- 
bel small, not evident in specimens of less than 2 or 3 inches in 
length. Eye rather small, about 5 in head. Scales small, considerably 
crowded and reduced anteriorly, about 30 series in front of the dorsal 
fin. Lateral line considerably decurved. Fins small ; the dorsal well 
behind ventrals, its last ray well in advance of the base of anal. Color 
dusky bluish above ; sides with a vague dusky band, black in the young, 
disappearing in the adult; belly creamy, rosy-tinted in the males in 
spring ; dorsal fin always with a conspicuous black spot at the base in 
front, which is bordered with red in the male ; a dark vertebral line ; 
scales everywhere edged with dark punctulations ; a dusky bar behind 
opercle ; males with the snout coarsely tuberculate in spring. Head 3f ; 
depth 4. D. 7 ; A. 8 ; scales 9-58-0 [those in the lateral line varying 
from 52 (? var. palHdus, Alabama to Arkansas) to upwards of 65] ; teeth 
2, 5—4, 2. L. 10 inches. Western Massachusetts to Georgia and Upper 
Missouri ; everywhere very abundant, ascending small streams. 
{Cyprinns corporalis and atromaculatus Mitchill, Amer. Month. Mag. ii, 324: SemofUus 
dorsalis and cephalus Rafinesqne, Ichth. Oh. 49 : Leuciscus iris and sforeri Cuv. & Val. 
xvii: Semotilus corporalis Cope, Cypr. Penn. 363: Leucosomus corporalis Gunther, vii, 
269: Leucosomus pallidas (Lat. 1. 52), Leucosomus incrassatus (Lat. 1. 64), Semotilus 
macrocephalus, and Semotilus speciosus Girard, Proc. Acad. Nat. Sci. Phila. 1856, 251, 
252, 204.) 
348. 8. thoroaiiiagius Jordan. 
Body short and rather stout, abruptly narrowed behind dorsal. Head 
short and thick, almost round. iMouth large, oblique, the jaws equal. 
