518 PROCEEDINGS OF THE ACADEMY OF • [DeC, 



a semi-popular descriptive catalogue, the Cyprinidse are again treated 

 as a whole. Bean then gives^ a largely compiled account of the same 

 nature, introducing also several hypothetical species. These latter 

 I have placed in foot-notes in the present paper. The contribution 

 by Evermann and BoUman^ on the Monongahela fishes is especially 

 valuable in furnishing us with an account of a basin which is now 

 much polluted. Finally, in a recent paper,^ I have mentioned a num- 

 ber of localities where much of my own material was obtained, and 

 thus mapped out the local distribution of some species. 



I have not recorded any examinations of the stomachs of some 

 of the species, leaving the details to be incorporated in future work. 

 Little attention is, therefore, given here to the food of the different 

 forms. 



The introduced species, such as the carp and gold fish, are not treated 

 in this paper. 



In explanation of the squamation formulas it may be said that the 

 median lateral longitudinal count of scales is in the lateral line, when 

 present, to the base of the caudal fin, and that the few on the latter 

 to be added are signified by the interpolated plus mark. Above 

 the lateral line the scales are counted obliquely down from the origin 

 of the dorsal fin posteriorly, and below obliquely up from the origin 

 of the anal fin forward. 



Acknowledgment is here made to those who" have so kindly assisted 

 me in securing material used in this work, their names being mentioned 

 elsewhere in my local works. 



All of the specimens used in the preparation of this paper are now 

 contained in the Academy's collections. 

 Campostoma anomalum (Rafinesque). 



Head 3^ to 4^; depth 3| to 5; D. iii, 7, i, rarely iii, 8, i; A. iii, 

 6, i; scales 43 to 55 -h 2 to 4, usually 2 or 3; usually 7 scales above 

 1. 1., occasionally 8; usually 6 scales below 1. 1., occasionally 7; 13 to 

 16 scales transversely from dorsal in young with incomplete 1. 1.; 

 18 to 25 predorsal scales; snout 2^ to 3f in head; eye 3^ to 6|; maxil- 

 lary 3 to 4^; interorbital 2^ to 3|; teeth 4-4. Body stout, moderately 

 compressed, predorsal gibbous in adult. Snout moderately convex. 

 Scales crowded anteriorly. Color brownish, tinted oHve or green 



3 The Fishes of Pennsvh^ania, Rep. State Comm. Fish., 1889-91 C1892) dd 

 1-149, Pis. 1-35. " V A 1 H- 



* Notes on a Collection of Fishes from the Monongahela River, A7in N Y 

 Acad. ScL, III, 1883-85 (1886), pp. 335-340. 



^ Records of Pennsylvania Fishes, Am. Nat., XLI, 1907, pp. 5-21. 



