REVIEW OF RAFINESQUE ON AMERICAN FISHES. 41 



17th genus, SEMOTILUS. (p. 86.) 



* 107th species, Silver-Spotted Chubby, SEMOTILUS ? NOTATUS, Sc- 

 motile tache. (p. 86.) 



Zygonectes NOTATUS (Raf.) Jor. 

 Zygonectes olivaceus (Storer) Agassiz. 



This description evidently refers to some Cyprinodont fish. The 

 translucent spot on the head of Zygonectes is so characteristic and con- 

 spicuous in life that I have no doubt that Rafinesque had that common 



species in mind. 



26th genus, SARCHIRUS. (p. 86.) 



1 108th species, Silver Ribbon-Fish. SARCHIRUS ? ARGBNTEUS, Sar- 

 chire argents, (p. 86.) 



Unidentifiable. 



Description erroneous and insufficient. 



31st genus, ACCIPENSER. (p. 86.) 



109th species, Gourd-Fish Sturgeon, ACCIPENSER LAGENARIdS Etur- 

 geon gourde, (p. 86.) 

 f Poly odon folium. 



Description second hand and erroneous. 



XXXVII. Genus, SAWFISH, PRISTIS, Poisson-scie. (p. 86.) 



110th species, Mississippi Sawfish, PRISTIS MISSISSIPPIENSIS, Pois- 

 son-scie du Mississippi, (p. 86.) 



Pristis antiquorum Shaw. 

 Passable description (of the saw only). 



t XXXVIII. Genu3, HORNFISH, PROCEROS, Proceros. (p. 87.) 



* Breadth one-sixth of the length, brownish, pale beneath; head small obtuse xvith a 

 large silver spot on the forehead before the eyes, jaws nearly equal; dorsal fen opposed to 

 the anal, tail oboval entire. 



It is found in the Cuviberland Eiver and the Little River, a branch of it. Commu- 

 nicated by Mr. Wilkins. It is rather doubtful whether it belongs to this genus, or Min- 

 niliis, Eutilus, «fec. It might perhaps be found to constitute a peculiar one by the small 

 mouth without lips, and the posterior dorsal Qn. Vent posterior. Pectoral and abdom- 

 inal Jins ohoval. Eyes large. Length 3 inches ; good bait for Perch, Eass, Red-eyes or 

 Ring-eyes, &c. 



t Entirely silvery, without bands or spots. 



Communicated by Mr. O wings. It is found in Licking River, Slate Creek, &c. 

 Length from two to three feet. It is called Pike, and may be one, but as it is described 

 without scales and very slender, I have added it to this genus until it is better known. 



X Apodal. Body elongated. Vent posterior. One dorsal fin opposed to the anal. 

 Month beneath transversal toothed. Snout protruded in a straight horn. Four spira- 

 cles or branchias on each side. 



Singular new genus of the family of Sharks or Antacea, from which however it dif- 

 fers by the want of abdominal fins. There are two species of it; the second, which I 

 have called Proceros vittatuSf lives in Lake Ontario, and has longitudinal stripes. 



