Cope.] 482 [June 7, 
lower limbs of the orbit. Tbe premaxillary border is far in advance of the 
orbit, and the extremity of the maxillary attains the anterior rim of the 
orbit. Dorsal and caudal radii extended, reach the basis of the caudal; 
the origin of the first is equidistant between the latter point and the end 
of the muzzle. Rays; D. KXVI; V. 10. A. VIII. Scales 7—37—5. 
Color silvery white. Length, a foot. Three specimens of this were taken 
in the Root River, Michigan, in all probability, though the label which 
accompanied them has disappeared. 
Carpiodes velifer, Rafinesque. 
Catostomus, Sp.? Lesueur Journ. Acad. Nat. Sci. Phila. I 110. @. 
velifer Raf. Ichth. Ohiensis 56. Sclerognathus cyprinus ‘‘Val.’’ Kirtland 
Fishes of the Ohio. Proc. Bost. N. Hist. Soc. V. 275 Tab. XXII fig. 2, not 
of Valenciennes. , 
I have referred my specimens to this species chiefly on the strength of 
the figure and description of Prof. Kirtland, and from the fact that Lesueur 
regarded it as so near the C. cyprinus, which he would not have done with 
the C. cutisanserinus of the Ohio before him. I had two specimens of 
the present fish, one of them from the Wabash. 
It has a shorter dorsal fin than the preceding, having but XXII rays, 
of which the anterior two are exceedingly elongate. The prominence of 
the muzzle is the most distinctive feature ; it is conic, the spines of the 
premaxillaries projecting at an angle of 45° to beyond the nasal crests, 
and the extremity not reaching the line of the lower rim of the orbit. 
The extremity of the mandible extends to the nares. Eye 4.25 in length 
of head. Head 3.75 in length ; depth 2.4 in the same. ‘Scales as in the 
last species. Second suborbital long as deep, trapezoidal. Origin of dor- 
sal .2 nearer end of muzzle than basis of caudal. Length of type speci- 
men ten inches. : 
Rafinesque says that this species is called skim-back and sailor, from 
its elevated dorsal fin which appears above the surface of the water, and 
that it often throws itself from the water. The name skip-jack is applied 
to a clupeoid of the same streams, the Pomalobus chrysochloris. Prof. 
Kirtland says the present species is not much valued as food. 
Carpoides grayt, Cope. 
Spec. nov. 
In this species we have the form and proportions of the last group, with 
shortened dorsal radii of the succeeding forms. 
The origin of the first dorsal radii is nearer the end of the muzzle than 
the origin of the caudal by one fourth of its basis. This embraces XXIV 
radii. Anal radii just to base of caudal. Orbit .25 the length of the head ; 
interorbital width 1 3-5 the former. Occipital region elevated ; muzzle 
much prolonged conic, mouth posterior, asin (0. velifer. In general this 
species is quite near the latter ; the number of scales is the same, and the 
proportions quite similar. The orbit is not so elevated, and the long dorsal 
radii about half as long as those of that species. Length of type eight 
