Storer's Synopsis of the Fishes of North America. 249 



above, is semilanceolate ; its breadth at the nostrils being equal to its length anterior to these 

 openings ; in profile, the snoot appears thin and horizontal, but its flexible point is readily 

 turned up a little. Body and top of head of a hue intermediate between yellowish and blu- 

 ish, partially iridescent ; shields ash-gray, giving a spotted appearance to the back. Sides 

 silver-white, with faint vertical bluish-gray bands ; belly white. Dorsal row of plates, fif- 

 teen. Lateral plates, forty-two to forty-seven. 



D. 52. P. 43. V. 34. A. 33. C. 27-86. Length, 11 feet. Weight, COO pounds. 



Columbia River, Richardson. 



Acipenser transmontanus, Columbia River Sturgeon, Rich., Fauna Boreal. Americ, in. p. 278, pi. 97. 

 " " Dekav's Report, p 



5. Acipenser Rupertianus, Rich. 



Snout slender, but not acute ; its sides are flattened and have a vertical height equal to 

 half the transverse breadth. Dorsal plates, fourteen in number; lateral shields, thirty-five in 

 number; abdominal shields, nine or ten, smooth, and indented rather than spined at tip. 



D. 40. P. 40. V. 30. A. 25. C. 28-84. Length, 20 inches. 



Northern Regions, Richardson. 



Acipenser Ruperiianus, Rupen Land-Sturgeon, Rica., Fauna Boreal. Ameiic, in. p. 311. 

 " " Dekav's Report, p. 317. 



6. Acipenser platorynchus, Raf. 



Head one fifth its total length ; slightly convex above, entirely flat beneath. Head and 

 body above brownish, beneath pure white. Dorsal plates, fifteen; lateral plates, forty ; 

 abdominal plates, eleven. 



D. 25. P. 45. V. 20. A. 14. C. 18-60 = 78. Length, 1 to 2 feet. 



Ohio River, Kirtland. 



Acipenser platorynchus, Shovel-fish Sturgeon, Spade-fish, Shovel-head, Flat-head, Raf., Ichth. Ohien., p. 80. 

 " " Shovel-nose Sturgeon, Kirtland's Report, p. 196. 



11 " Kirtland, Eost.Journ. Nat. Hist., v. p. 25, pi. 8, fig. 1. , / // 





'tJENTJS II. POLYODON, Lacep 

 Snout enormously prolonged, with a dilated middle, resembling a leaf. 

 Their general form, and the position of the gills, similar to those of the Stur- 

 geon ; but their gills are still more open, and their operculum is prolonged 

 into a membranous point, which is extended as far as the middle of the body. 

 Their mouth is very much cleft, and furnished with many small teeth. The 

 upper jaw is formed by the union of the two palatines to the maxillaries. 



1. Folyodon folium, Lacep. 

 Body subcylindrie, flattened laterally. Head gibbous at its union with the body. The 



75 



