ENCHELYCEPHALI ANGUILLIDAE ANGUILLA TYEANNUS. 039 



sonable doubt exists but that this list may be largely increased by future 

 explorations. 



It is proper to add that in the preparation of this report Prof. E. D. 

 Cope has examined and described the new genera, and nearly all the spe- 

 cies, and Dr. H. C. Yarrow has made certain needful comparisons, and pre- 

 pared the synonymy and bibliography, besides furnishing the lists, with notes 

 upon the different specimens enumerated. 



CHONDROSTEL 



SCAPHIEHYNCHOPS PLATYEHYNCHUS, Eaf. 



AcipeHser platoryncUus, EAFIN., Iclithy. Ohiens, 1820, SO. KIRTLAND, lie p. Zool. Oliio, 



1838, 106. Id, Bost. Jour. Nat. Hist,, v, 1845, 25, pi. viii, f. 1. STOKER, 



Synopsis, 1846, 249. 

 Scaplrirhynclius rajinesquii, HECK, Ann. Wieu. Mus. Naturg., i, 1835. Id., Zool. Abhanill. 



Ann. Wien. Mus. Naturg., i, 1841, 72, pi. viii. 

 ScapMrhynchus platirliynchus, BD., Icouogr. Encycl., ii, 1850, 238. GIKARD, P. E. E. 



Eep., x, 1859, Icbthy., 357. 



Two specimens (L 51), obtained from the Rio Grande, near Albu- 

 querque, by Dr. Oscar Loew, differ in minor and only individual character- 

 istics from typical specimens from the Ohio River. The range of this 

 sturgeon is thus extended farther west than has heretofore been observed. 

 It is not included in the enumeration of fishes of the Rio Grande in Girard's 

 Ichthyology of the United States and Mexican Boundary. 



PHYSOSTOMI. 



GINGLYMODI. 



Descriptions received from various intelligent persons indicate that a 

 species of gar occurs in the Rio Grande ; but no specimens were obtained 

 by the expedition. 



ENCHELYCEPHALI. 



ANGUILLA TYEANNUS, Gir. 



Anguilla tyranmts, GIR., U. S. & Mcx. Bound. Snrv., ii, Ichthyology, 75. 

 Three specimens from near Santa Fe (Dr. H. C. Yarrow). 



