128 CONTEIP.IITIONS TO NORTH AMERICAN ICHTHYOLOGY III. 



Mea8urement8 of three specimens of Myxostoma anisura. 



10788. 



Length, inches. 

 Depth 



Length of head 



Width of iuterorbital area 



Length of snout . 



Eve 



2i 

 .'28 

 .18 

 .08 

 .07i 

 .05 



. ir)i 



.2-2 

 .10 

 .31 

 .20 

 .13 

 2,13 

 Scales G-4G-5 



Length of base of dorsal 



Height of longest ray of dorsal. 



Height of last i-ay of dorsal 



Length of upper caudal lobe . . . 

 Length of lower caudal lobe... 

 Length of middle caudal rays.. 

 Dorsal rays 



12267. 



'>7 



.14i 

 .22 



.29 

 .2.5 



2,12 



12J94. 



m 



.20 



.18 



.16 

 .23^ 



,31 



2,13 



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

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

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

 fins, they conld hardly be distinguished. 



Specimens in United States National Museum. 



Number. 



8505 

 10788 

 11105 

 11107 

 11108 



Locality. 



Sandusky, Ohio. 

 Cincinnati, Ohio 

 Cincinnati, Ohio 

 Cincinnati, Ohio 



Collector. 



J. W. Milner. 

 J. W. Milner. 

 J. W. Milner. 

 J. W. Milner. 



10. MYXOSTOMA PCECILURA Jordan. 



Variegnted-tailed Bed Horse. 

 1877 — Myxostoma pwcilura Joudan, Bull. U. S. Nat. Mus. x, G6, 1877. 

 Myxostoma pmcilura 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 

 tlie 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 other respects, it most approaches 

 M. macrolcpidotum lachrymale. 



