Oope.] 478 (June 7, 
Ptychostomus breviceps, Cope. 
Species nova, 
An elongate species with small head, and very convex occipital region, 
characterized by the presence of X ventral radii. 
Depth .25 the length; orbit 3.75 in head, 1.75 in interorbital width. 
Cranial ridges not strong. Basis of dorsal five-sixths the anterior height, 
radii XIII ; free margin deeply concave. Body compressed, dorsal line 
very narrow. Scales 6—45—5. Muzzle short conic, projecting beyond 
mouth. Latter small, lips short, the posterior well developed, not emar- 
ginate. 
Color white, yellowish below ; scales above with a little black at their 
bases. 
Length of specimen examined, ten inches. 
This fish belongs to the basin of the Ohio. I have a specimen from the 
Youghiogheny. The number of the ventral radii is very constant in this 
genus, but if the increased number should prove to be accidental, the gen- 
eral chaarcters of this fish would approximate it to Pt. aureolus. 
A peculiarity of the type specimen consists in an additional ray in the 
anal fin—eight instead of seven in the other species, and the alteration of 
the third and fifth to perfectly simple, unbranched rays, scarcely attain- 
ing the edge of the fin. This may be abnormal. 
. 73. PrycHosTomts conus, Cope. 
Species nova. 
This fish represents the P. coregonus in the section of the genus with 
fully developed lips. 
Form flat, with elevated dorsal line, and small conic head. D. radii 
always XIV. Eyes large, mouth exceedingly small, far overpassed by the 
conic muzzle. The superior regions are smoky and the scales with black 
bases ; below, with the inferior fins, white. Dorsal fin dusky. 
The lips of this species are smaller than in Pt. erassilabris, though the 
inferior is similarly truncate behind. The muzzle is much more conic and 
produced than in that fish. The dorsal radii are more numerous. 
Numerous specimens from the Yadkin River, North Carolina, where it 
is taken in large numbers with Pt. collapsus, Pt. robustus, etc., but is of 
less value than they. 
74, PTYcHOSTOMUS CERVINUS, Cope. 
Journ. Acad. Nat. Sci., Phila, 1868, 285, Tab. iii, fig. 4. 
This species constitutes a well marked section of |the genus, character- 
ized by a cylindric form, the transverse diameter of the body being equal 
to the vertical. Before describing this species in detail, I may premise 
that I have found no little difficulty in attempting to identify the Pt. me- 
lanops, Raf., of Dr. Kirtland’s fishes of the Ohio. The figure resembles 
the Pt. crassilabris very closely, but the description of ‘‘body full, cylin- 
dric,’’ will not allow of the identification. Should the fin formula of Pé. 
breviceps be abnormal, the compressed body and lack of spots point to 
specific diversity. I had thought the present species intended, but the 
