THE CYPRINOIDS OF CENTRAL NEW JERSEY. 333 
13. Hybopsis phaénna Cope. Prof. Cope* has described the cy- 
prinoid here referred to as a distinct form of Hybopsis, having 
received specimens, collected by the writer, in 1864. He says, 
“ Hybopsis phaénna is a species, found in some of the tributaries of 
the Delaware, which I have received from Trenton, N. J -, from my 
friend Charles C. Abbott. It is more elongate in form than H. 
Hudsonius and H. Storerianus, and has not the rounded front of the 
first or small compressed head of the last., Eye a little less than 
one-third length of head ; latter 54 times to concavity of tail, and 
more than equal greatest depth of. body...... Angle of 
mouth not posterior to anterior nostril. Scales $, 38. Lateral 
line very slightly deflected opposite the dorsal fin. Base of caudal 
to posterior edge of dorsal, equal from latter to beginning of the 
skin of the head. D. 1-8; C. 19; V. 1-8; B: 1-95: P. 15; 
Length 4 inches.” 
The differences between the two, H. Hudsonius and H. phaënna, 
which'are quite uniform and readily noticed in living specimens, 
are as follows: 
,  Hybopsis Hudsonius. Hybopsis phaénna. 
Snout blunt. Angular in 
profile. 
Diameter of orbit less than 
length of snout. 
Snout tapering. Curved in 
profile. 
Diameter of orbit more than 
length of snout. 
Anal fin, depressed, reaches Ventral fin, depressed, does 
to the anus. 7 not reach the anus. 
Bright silvery stripe along Plumbeous stripe along the 
the lateral line, golden pos- lateral line; and four narrow 
teriorly, and uniform olive- blue lines between the dorsal 
green from dorsal stripe to stripe and lateral line. 
lateral line. 
Prof. Cope, in his monograph of Pennsylvania cyprinoids, says 
“ There may still be some question as to the pertinence of this 
specimen (from the Delaware, at Trenton, N. J.) to H. Hudsonius,” 
he having referred it to that pecies then, and subsequently 
there no specimens of the cyprinoid found in the Delaware that 
were precisely such as described by De Witt Clinton, then it might 
be thought that the H. phaénna was simply a modified form of 
that species; but the two being associated, each preserving the 
distinctive features, as pointed out by us, with the non-occurrence 
oe naka cdl ch 
* Proc. Acad. Nat. Sci. Philad. 1864, p. 279. 
