CataIvOGue Recenti^y Described Moleusca 119 



Ferrissia ERAGiLis (Tryon). 



As suggested by J. G. Cooper (26, p. 83), and Hannibal (53, p. 148), this 

 is probably the non-septate form of Gnndlachia calif ornica. 



Ferrissia haedemani (Bourgiiinat). 



Ancylus haldemani Walker, Naut., XVIII, 1904, p. 78, pi. 6, figs. 9-13. 



Ferrissia hendersoni (Walker). 



Ancylus hendersoni Walker, Naut., XXI, 1908, p. 138, pi. 9, figs. 8-10. 

 Type locality : Lake Waccamaw, N. C. 



Ferrissia novangli^ (Walker). 



Ancylus noTanglicc Walker, Naut., XXI, 1898, p. 138, pi. 9, figs. 5-7. 

 T)'-pe locality : Cambridge, Mass. 



Ferrissia ovalis (Morse). 



Ancylus ovalis Walker, Naut., XVIII, 1904, p. 79. 



Ferrissia paraeeEla (Haldeman). 



Ancylus parallelus Walker, Naut., XVIII, 1914, p. yy, pi. 5, figs. 1-9. 



Ferrissia pumiea (Sterki). 



Ancylus pumilus Sterki, 8th Ann. Rep. O. St. Acad. Sci, 1900, p. ^6; sep- 

 arate, p. 7; Walker, Naut., XVIII, 1904, p. 82, pi. 6, figs. 20-22. 

 Type locality : Tuscawaras River, Tuscawaras Co., O. 



It is possible that this will prove to be the non-septate form of Gnnd- 

 lachia meekiana. 



Ferrissia RivuLARis (Say). 



Ancylus rivularis Walker, Naut., XVIII, 1904, p. 25, pi. i, figs, i-io, 13-14. 



Ferrissia seiimekii (Pilsbry). 



Ancylus ohliquus Shimek, Bull. Lab. Nat. Hist., St. Univ. la., I, 1890, p. 214, 

 pi. Ill, figs. 5a-c, non Broderip and Sowerby (1832), nor C. B. Ads. 

 (1850), nor Krauss (1853). 

 Ancylus shimekii Pilsbry, Naut., IV, 1890, p. 48; Walker, Naut., XVIII, 



1904, p. 81, pi. 6, figs. 17-19. 

 Type locality: Deadman's Run, Lincoln, Neb, 



Pilsbry (1. c. and 54, p. 63) has suggested that this may be the non- 

 septate form of a Gnndlachia, perhaps meekiana. This was controverted 

 ■by Walker (1. c), but nevertheless may be correct. 



