I02 Bryant Wai,k£;r 



Planorbis ORBICUI.US Morelct. 



Planorbis orbiculus Morelet, Test. Noviss., 1849, I, p. 17. 



Includes haldemani Dunker (1850) non haldemani C. B. Adams (1849;. 

 Fischer and Crosse also include liebmanni, but Pilsbry (1. c.) considers it 

 to be distinct. 



Planorbis orEGONEnsis Tryon. 



Planorbis oregonensis Tryon, Am. J. of Con., I, 1865, p. 231, pi. 22, fig. i7. 

 Type locality: Pueblo Valley, Oregon. See trivolvis. 



Pla-Ngrbis parvus Say. 



Includes billingsii Lea according to Vanatta (136, p. 54) and Dall (32, 

 p. 95) and circumstriatus Tryon according to Vanatta (1. c). 



Planorbis parvus walkeri Vanatta. 



Planorbis parvus zmlkeri Vanatta, Naut., XVI, 1902, p. 58. 

 Type locality: Hartland, Vt. Also Michigan. 



Planorbis perEoratus "Gould?" Sowerby. 



Planorbis perforatus Sowerby, Con. Icon., Planorbis, 1876, Sp. 105, pi. 



13, fig. 105. 

 Type locality : United States. 



Gould never described a Planorbis under this name. Clessin (20, p. 

 227) suggests that the species is perhaps from East Asia. 



Planorbis planulatus Cooper. 



Is doubtfully referred to P. opercularis Gld. as a variety by Cooper (25, 

 p. 100). 



Planorbis plExata Ingersoll. 



Planorbis plexata Ingersoll, U. S. Gcol. & Geog. Surv. Terr., 1874, p. 402, 



text-fig. 

 Type locality : St. Mary's Lake, Antelope Co., Col. 



Is a var. of trivolvis according to Stearns (121, p. 105) and Cooper 

 (26, p. 85). 



Planorbis rubellus Sterki. 



Planorbis harni Pilsbry, Naut., IV, 1891, p. 137, sine desc. 



Planorbis exacuHis rubellus Sterki, L. and F. W. Moll., New Phila., 189.^, 



p. 7. 

 Planorbis rubellus, Pilsbry, Naut., XIII, 1899, p. 51. 

 Type locahty: Stone Creek Valley, Odbert's Station, O, 



