326 © THE CYPRINOIDS OF CENTRAL NEW JERSEY. 
Modifications of this system will occur to every one. - Dr. 
for the inflation of the emptied skin. For an oven, the Vi 
entomologists employ an ordinary gas-chimney open at both end 
and inserted in a sand bath, which prevents perhaps the danger of — 
too great heat. i 
NOTES ON THE CYPRINOIDS OF CENTRAL 
| NEW JERSEY. 
BY CHARLES C. ABBOTT, M. D. 
Tue family of fishes known scientifically as the Cyprinidæ, and 
popularly as “shiners” and “minnows,” is well represented in the 
Delaware river and its tributaries. A careful study of the seve 
species of cyprinoids found in the immediate vicinity of Trent "I 
N. J., convinces us how difficult it is to define clearly the di 
tinctive characters of many of these fishes, even with a very l 
and fin arrangement being especially noticeable. Thereiol 
while we have ventured to describe, as new to science, a small 
prinoid, collected by us, for the first time, during the season 
_ 1873, we have purposely confined our notes to the species 6" 
ered here in large numbers, and not included in several small 
lections received from other portions of the state. © 
therefore, we propose to give the full list of species, found in ’ 
a small fraction of the state’s territory, we believe it really pr 
the entire cyprinoidal fauna of the state. 
In his admirable synopsis,* Prof. Cope mentions twelve sp 
of six genera, belonging to the Delaware and its tributaries. ~ 
study of the material at our command enables us to ie Re 
without difficulty, all of these as described and figured in Oe 
_ nopsis referred to; but there is also, it must be mentioned 
specimens that we have considered as species, as defined by 
Cope, in which variations exist, that are of sufficient MP" 
_ it would seem, to make them even more than marked va 
-~ * Synopsis of the Cyprinidw of Pennsylvania: Transactions of America® 
- Boc., vol, xiii, 
