128 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY III. 



Measurements of three specimens of Myxostoma anisura. 



It is perhaps barely possible that this fish is the male of aureolum 

 at a certain age, but it seems to me decidedly improbable. The resem- 

 blance between the two is, however, very strong, and, except for the 

 fins, they could hardly be distinguished. 



Specimens in United States National Museum. 



10. MYXOSTOMA PCECILURA Jordan, 



Variegaled-tailed Red Horse. 

 1877Myxosloma pcccilnra JORDAN, Bull. U. S. Nat. Mus. x, 66, 1877. 



Myxostoma pcccilura JORDAN, Man. Vert. ed. 2d, 315, 1878. 

 HABITAT. Tangipahoa River, Southeastern Louisiana. 



This singular species is known only from two specimens in the United 

 States National Museum, recently collected by Mr. Fred. Mather, of 

 the United States Fish Commission. Whether the peculiar form and 

 coloration of the caudal is general or is confined to the male sex is not 

 certain. In any event, it will serve to sharply distinguish this species 

 from all the others now known. In 6ther respects, it most approaches 

 M. macrolepidotum lachrymale. 



