1889.] NATURAL SCIENCES OF PHILADELPHIA. 247 



slender filament. Anal little more than half the length of the dorsal 

 and placed entirely behind it. Color, yellowish-brown above, 

 lighter below. platyehynchus, 1. 



1. Scaphirhynchus platyrhynchus. Shovel-nosed sturgeon : white sturgeon. 



Acipemer platorhynchus Rafinesqne, Ichth. Ohiensis, 80, 1820 

 (Ohio river); Kirtland, " Rept. Zool. Ohio, 196, 1838;" Kirtland, 

 Bost. Jour. Nat, Hist, V. 25, 1841 (Cincinnati) ; Storer, Synop. 

 Fish. N. Amer. 501, 1846 (Ohio river). 



Scaphirhynchus platyrhynchus Baird, " Iconogr. Encycl. II. 238, 

 1850 ; " Girard, IT. S. and Pacif. R. R. Survey, 337, 1858 (Missouri 

 river; Poteau river); Dumeril, Hist. Poiss! II. 269, 1870 (New 

 Orleans ; Wabash river) ; Jordan, Man. Vert. Ed. V. 34, 1888. 



Scaphirhynchops platyrhynchus (Gill MSS.) Jordan andCopeland, 

 Bull. Buff. Soc. Nat. Hist. 161, 1876 ; Cope and Yarrow, Zool. Lieut. 

 Wheeler's Expl. W. 100th Merid. V. 639, 1876 (Rio Grande); 

 Nelson, Bull. 111. Mus. Nat, Hist. 51, 1876 (Ohio river); Bean, 

 Proc. U. S. Nat. Mus. 114, 1880 (Ohio river; Republican river, 

 Kan. ; Yellowstone river) ; Hobbs, Bull. U. 8. Fish. Com. 125, 1881 

 (Ohio river) ; Jordan and Gilbert, Synop. Fish. N. Amer. 88, 1882 ; 

 Jordan, Proc. U. S. Nat, Mus. 318, 1884 (New Orleans); Jordan, 

 Cat, Fish. N. Amer. 13, 1885. 



Acipemer cataphractus Gray, "Proc. Zool. Soc. London, 122, 

 1834;" Giinther, Cat. Fish. Brit. Mus. VIII. 345, 1870 (Ohio; 

 New Orleans). 



Scaphirhynchus rafinesquii Heckel, "Ann. Wiener Mus. Natur- 

 gesch. I. 71, pi. 8, f. 1, 1835 ; " Brutzer, "Dessert. Dorpat. 1860." 



Habitat. — Mississippi valley and southern and western streams. 



Etymology. Platys, flat ; rhynchos, snout. 



This well-known species is found in abundance in all the large 

 rivers of the west and south. Early in May it ascends the streams 

 for the purpose of sprawning. In the Ohio river it is taken in con- 

 siderably large numbers and used for food, though it does not seem 

 to be highly valued. Its habits are much like those of A. rubi- 

 cundus. 



ACIPENSER. 



Acipemer Artedi, Genera Piscium, 68, 1738 ; Linnaeus, Systema 

 Naturae, 237, 1758 (sturio). 



Sturio Rafinesque, Indice d'lttiologia Siciliana, 41 et 58, 1810 

 {sturio). 



Sterlet us Rafinesque, Ichth. Ohiensis, 79, 1820 (serotinus). 



Dinectus Rafinesque, lc. 82 (truncatus). 



Huso Brandt and Ratzeburg, "Medizin. Zool. II. 3, 1833" 

 (huso). 



Sterletus Brandt and Ratzeburg, Medizin. Zool. II. 3, 1833 

 (ruthenus). 



