678 GEOLOGICAL SURVEY OF NEW JERSEY. 



" This species is numerically ahead of any cyprinoid in the 

 State, if we except the chub. Thousands swarm every brook, 

 and often actually crowd each other to their destruction. Found 

 in the rivers and creeks as well as brooks." 



MINNILUS, Raf. 



(Luxilus. Hypsilepis. Lythrurus, &c.) 



M. cornutus, Mitch., var. cornutus {chrysocephabts, Plargynis argentatus, 

 &c.) Common Shiner. Red-fin. Dace. Rough-head. 



Teeth with narrow grinding surface ; scales large, but only 

 narrowly exposed ; abdomen rounded ; males in spring with red 

 (not white) fins, and with tubercles on head ; snout blunt ; body 

 compressed and growing deeper in front with age ; mouth nearly 

 horizontal ; dorsal over ventrals in young, further back with age ; 

 steel blue above, with golden bands ; sides silvery (rosy in spring 

 males) ; twenty-two to twenty-five scales in front of dorsal fin ; 

 fewer in western and southern varieties. Length, 5 to 8 inches. 



" Very abundant in all the streams of flowing, cool water, but 

 apparently more numerous as we ascend into the northern 

 counties of the State." 



M. chalybaeus, Cope {Hybopsis). Pigmy Minnow. 



Body with abruptly-elevated back ; head flat above, narrow, 

 with pointed muzzle ; mouth oblique, lower jaw the longer ; eye 

 large ; eighteen scales in front of dorsal ; brownish above, a 

 broad, black lateral band ; belly straw colored ; orange in spring 

 males. Length, 1| to 2 inches. 



"Quite a common species, generally found associated with the 

 Clinostomus and the many-banded minnows." 



RHINIOHTHYS, Ag. 



(Argyreus, &c.) 



R. cataractae, Cuv. & Val. [nasutus, Ceratichthys, Leuciscus, Gobio.) 

 Long-nosed Dace. 



Body not much compressed ; mouth small, upper jaw not pro- 

 tractile; a barbel on maxillary; teeth hooked, without grinding 

 surface ; scales small ; dorsal behind ventrals ; head long, muzzle 

 flat, narrow and prominent ; pectoral fins enlarged in male ; color 

 olivaceous, paler below, with dusky points ; back nearly black 



