140 Bryant Walker 



PyRGULOPSIS SCALAKIKORMIS (Wolf j. 



Pyrgiila scalariforuiis Wolf, Am. J. of Con., \^, 1869, p. 198, pi. 17, l"ig. 3. 

 Pyrtjitlopsis scalariforuiis Shimek, Bull. Lai). Xat. Hist. St. Univ. la., IJ, 



1892, p. 168, pi. xiii, figs. 3a-d. 

 Pyrgiila scalariformis mississippiensis i'ilsbry, Am. Xat., 1886, p. 5. No 



description. 

 Pyrgiilopsis mississippiensis Call and I'ilsbry, Pr. Davenport A. N. S., V, 



1886, p. 13, pi. II. figs. 14-16; Walker, Xant., XIX, 1906, p. 116, pi. 



5- fig- 15- 

 Type locality: Illinois River, Tazwell Co., Ills. Holocene. 



According to Shimek (1. c. ) mississippiensis is a synonym of scalari- 

 formis. 



Pyrgulopsis ozarkensis Hinkley, 



P\rgulopsis ozarkensis Hinkley, Pr. U. S. Nat. ]\Ius., 49. 1915, p. 588, pi. 



78, fig. 2. 

 Type locality : Xorth Fork of White River, above Norfolk, Ark. 



Pyrgulopsis spiEEDoni (Pilsbry). 



Aninicola sheldoni Pilsbry, Naut., IV, 1890, p. 52.- 

 Type locality : Lake Michigan, Racine, Wis. 



This species seems to be a Pyrgulopsis rather than an Aninicola. 



Pyrgulopsis waraspiEnsis Hinkley. 



Pyrgulopsis zi^'abasliensis Hinkley, Xaut., XXI, 1908, p. 117. 

 Type locality : Wabash River, The Chains, Posey Co., Ind. 



Genus POTAAIOPYRGUS Stimpson, 1865. 



Potamopyrcus coronatus (Pfeiflt'er). 



Palndina coronata Pfcili'er, Wiegm. Archiv., I. 1840, p. 253. 

 Type locality: Cuba. 



Listed from ]\Iiami River, Fla., by Rhoads (113, p. 47). 



PoTAMOPYRGus SPiNOsus (Call and Pilsbry"). 



Pyrgulopsis spinosa Call and Pilsbry, Pr. Davenport A. N. S., V., 1886, p. 



14, pi. II, fig. 17-19. 

 Hydrobia te.vana Pilsbry, Ibid, \', 1886, p. 33. pi. Ill, fig. 1-6. 

 Type locality: spinosiis, Comal Creek, Texas; te.vana, Guadelupe River 



and Comal Creek, Tex. 

 According to Pilsbry ^91, p. 327) this species is a Potaniopyrgus and 

 is doubtfully distinct from coronatus. Te.vana is the ecarinate form. 



