CORRESPONDENCE. 



To the lull tor of the American Naturalist: 



Sir : Dr. T. D. A. Cockerell calls my attention to the fact that two 

 generic names of fishes used in Jordan & Evermann's f ishes of North 

 America have been earlier used in a generic sense. 



The first is Falcula Jordan & Snyder, Bull. U. S. Fish Comm. for 

 1899, p. 124 (1900) type chapahe. For this genus of Mexican 

 Cyprinida;, we suggest the new name of Falcularius Jordan & Snyder. 

 Falcula Conrad, Amer. Journ. Conch. VI, p. 77, is an earlier genus of 

 mollusks. 



The' second is Xenochirus Gilbert, Proc. U. S. Nat. Mus. XIII, 

 1890, p. 90, a genus of Agonidae. The same name, Xenochirus, 

 was used by Gloger in 1842, for a genus of Mammals. 



As a substitute for Xenochirus, Dr. Gilbert proposes the new name, 

 Xeneretmus Gilbert. The type of Xeneretmus is Xenochirus tria- 

 canthus Gilbert. There is also a genus Xenochira (Huswell, 1879) 

 but that name being spelled differently from Xenochirus, is suffi- 

 ciently distinct. 



D. S. Jordan. 



