No. 519] 



the prow fish, Zaprora silcnus. 



In the Proceedings of the Biological Society of Washington, 

 Volume 22, 1909, Mr. T. D. A. Cockerell, of the University of 

 Colorado, with Mr. Otis Callaway, has a very interesting dis- 

 cussion of the scales of fishes, as showing their genetic relation- 

 ship. In this paper the herbivorous cyprinoid fishes are treated, 

 and it is shown that the subfamily Chondrostomime, as ivcog- 

 nized in America, is even more heterogeneous than was hitherto 

 supposed. Chrosomus stands entirely apart from the others, 

 its scales having the primitive sculpture of the scales of the 

 suckers. The herbivorous forms in America are divided by 

 Mr. Cockerell into four subfamilies: ( 'hrosoinina\ including 



are most nearly rein 

 In the same Procc 

 M. Allison, continu 



of which the type is k> nhn l;u hsis, from 

 basing the genus on the character of the sci 



mrative Zoologu. l!)n:». 

 e of the United States 

 (inlf Stream during 



