BULLETIN OF THE UNITED STATES FISH COMMISSION. 67 



ESOCIDiE. 



29. Esox reticulatus Lo Sueur. — Green Pike. " Jackfish." 



Several specimens . of fishes belonging to the genus Esox were ob- 

 tained in the Big Black, near Edwards, and in pools along the Pearl at 

 Jackson, which I refer to the above species. I am not able to dis- 

 tinguish my specimens from specimens of E. reticulatus from New Eng- 

 land. The dorsal rays number as high as 17, as in E. reticulatus ; while 

 there are said to be but 12 in E. Eavenelu. The series of vomerine teeth is 

 certainly not longer than the palatine, while thej" are posteriorly weak 

 and scattering. 



30. Esox umbrosus Kirt. — Little Pickerel. 



This appears to be a very abundant fish in the Lower Mississippi 

 Valley, as well as further north. Specimens were secured at Memphis, 

 Jackson, Vaughan's, and Grenada. 



HYODONTID.E. 



31. Hyodon selenops Jot & Bean. — Southern Moon Eye. 



Two specimens of this beautiful species were caught for me in the 

 Pearl River at Jackson. 



32. Clupea chrysochloris (Raf.) Jor. — Ship Jack. 



Two small specimens were secured at Yicksburg. 



33. Dorosoma cepedianum (LeS.) Gill. — Hickory Shad. 



Abundant everywhere. Collected at Memphis, Vicksburg, Edwards, 

 Jackson, and Grenada. 



CYPRIMDJE. 



34. Hyborhynchus notatus (Raf.) Ag. — Blunt-nosed Minnow. 



Specimens of this widely distributed species were obtained at Vicks- 

 burg, in the Big Black at Edwards, and in the Yalabusha at Grenada. 



35. Hybognathus nuchalis Ag. — Blunt-jawed Minnow. 



Eybognathus argyritis Hay, Proc. U. S. Nat. Mus. iii, 1880, 503 (in part). 

 Of the minnows in my collection belonging to the genus Hybognathus, 

 there are two well-marked species. One of these I refer to Agassiz's 

 species, H. nuchalis. tbe other to H. argyritis, Girard. The examination 

 of a considerable number of specimens has led me to recognize the fol- 

 lowing differences: H. nuchalis has a small eye, its diameter being equal 

 to or less than the snout. The mouth is small and horizontal; the lower 

 jaw is shorter than the upper, and is received within the upper in the 

 closed mouth, so that the mouth is inferior. The suborbital bones are 

 broader than in H. argyritis. This difference is especially noticeable in 

 the case of the anterior suborbital, which in the species last named is 

 very narrow. It may be said that in H. nuchalis the anterior suborbita 

 is twice as long as wide, while in H. argyritis it is three times as long 



