ST. A and its Tributaries. 345 
* 
$ o genus Semotilus was established by Rafi- 
‘ E 
nesque, to include such of the Cyprinide as could not 
be arranged in existing genera. The characters of 
the genus are as follows. “Body elongated, some- 
what compressed, with rather large scales. Vent 
posterior, or nearer to the tail. Head flat above, and 
somewhat shielded. Gill-cover double, scaleless ; 
three. branchial rays. Mouth large and with lips. 
Preoperculum angular. Dorsal fin posterior, opposite 
to the vent, and behind the abdominal fins. Abdom- 
inal fins with eight rays, and without append, 
S. cephalus. ` Raf. The Hora: Chub. 
Semotilus cephalus. Rafinesque’s Ichthyologia Ohiensis. p. 49. 
Semotilus cephalus. Kirtl. — on the Zool. of — 
p.169. | " 
FOCUPIMN Y. Fig. Pe SER 
« Diameter one fifth of the total length : ^ om: 
back “brownish, lateral line raised upwards at the ` 
base : fins fulvous ; the pectorals reddish ; the caudal 
pale at the end and unspotted ; the dorsal vik 9 rays, 
and a large black n at the anterior base ; anal vi 
9 rays. s 
* Length from 6 to 8 inches. Not uncommon in srs 
creeks of Kentucky, &c. Vulgar names, Chub, Big. a 
mouth, and Big-head. It has really the largest head — 
and mouth of this tribe. Iris reddish, iridescent. : a 
Pectoral fins with 15 rays, trapezoidal and short ; E. 
abdominal fins rounded, dorsal fin beginning over ; 
them. Spot round. Tail with 20 du A 
The foregoing is Rafinesque's description. It is 
correct in every particu p mea few in- 
VOL. II. -=No gi ; 
