CATOSTOMID 2. 39 
ascending even the smallest brooks,’’ May 26 given as a breeding 
date, Parker, Williamson and Osburn, 1898 ; Ohio river and Ice 
creek at Ironton, John’s creek at Waterloo, Huron river at Milan, 
Sandusky Bay, Ashtabula creek at Ashtabula, Wabash river at 
Celina, Stillwater and Wolf creeks near Dayton, North Fork of 
Licking river at Newark, R. C. Osburn, 1899; Niggermill Run 
at Salem, E. B. Williamson, 1900; Cuyahoga river at Hawkins, 
Grand river at Painesville, Chagrin river at Willoughby, Wheel- 
ing creek at Bridgeport, Ohio river and McMahon creek at 
Wheeling, Licking reservoir, R. C. Osburn, 1900. 
Moxostoma breviceps (Cope). 
Form of a Coregonus, with deep, compressed body, small head, and a 
conic snout, which overhangs the very small mouth. Caudal fin, with the 
upper lobe falcate, much longer than the lower. Dorsal fin short, high, 
falcate, the anterior rays 114 to 1% times base of fin, the free border much 
concave. Depth 3% in length. Head5to5%. D.120r13. Scales 6—45-5. 
Lower fins bright red. 
‘‘ Abundant in Lake Erie; our specimens from Sandusky, 
Toledo and Cincinnati,’’ Jordan and Evermann (Bull. 47, U.S. 
Natl. Mus. ). 
Genus: PLACOPHARYNX. 
Placopharynx duquesnii (Le Sueur). 
Head 4; snout rounded, projecting ; lower jaw somewhat oblique when 
closed ; eye 4% in head. Body rather stout, somewhat compressed, in form 
like that of W/. aureolum, D. 13; A. 7 (not 9, as is usually given, in any 
Ohio specimens I have seen); scales 6-45-6. Lower pharyngeal bones very 
strong, the lower teeth on these bones very strong and molar-like, little 
compressed, and having broad grinding surfaces. 
This species so closely resembles 47, aureolum that it can be 
positively distinguished only by the appearance of the lower 
pharyngeal teeth, and it has no doubt been much overlooked. 
Recorded by Jordan (Ohio Rept.) on the strength of a skeleton 
found by Dr. J. M. Wheaton in the Scioto river at Columbus, one 
of the very few specimens known at that time. The species has 
since proved to be well distributed over the state, though not 
usually abundant. Hamilton County, not rare in the Ohio, Hen- 
shall, 1888; Lorain County, Lake Erie, common with other 
