136 Bryant Walker 



AmnicoIvA walk^ri Pilsbry. 



Amnicola zvalkeri Pilsbry, Naut., XII, 1898, p. 43; Walker, Naut., XIX, 

 1906, p. 117, pi. V, fig. 12. 



Type locality : High Island Harbor, Beaver Ids., Lake Michigan. 



Range : Upper St. Lawrence drainage from Ottawa, Ont., to Lake Mich- 

 igan. 



Amnicoi,a WINKI.EYI Pilsbry. 



Amnicola zvinkleyi Pilsbrj^, Naut., XXVI, 1912, p. i, pi. I, figs. 9-10. 

 Type locality: Saco, Me. 



Section CINCINNATIA Pilsbry, 1891. 



AmnICOI,A CINCINNATIENSIS (Anth.). 



Amnicola scarboroughi Tryon MSS. is a synonym according to Tryon (132, 



P- 54). 



Baker's remark (4, p. 336), that Binney's fig. 162 is an error is incor- 

 rect. That figure does not represent this species, but is the radula of A. 

 sayana Anth. (Pornatiopsis cincinnatiensis Lea). The same author (loc. 

 cit., pp. 335 and 343) has reversed the synonymy of the two species, which 

 explains his remark that Haldeman's figures of the two species are inter- 

 changed. 



The figure given for this species by Dall (32, p. 118, fig. 87) is' also 

 incorrect, being Binney's fig. 166 of A. limosa. 



Amnicola emarginata (Kuster). 



Paludina obhtsa Lea, Pr. Am. Phil. Soc, II, p. 34, (1841), non P. obtusa 



Phil. (1837). 

 Paiildina emarginata Kuster, Con. Cab., Paludina, 1852, p. 50, pi. 10, figs. 



3-4; 

 Cincinnatia binneyana Hann., Pr. Mai. Soc. Lond., X, 1912, p. 190. 



There seems to be no valid ground for the new name proposed by Han- 

 nibal. 



Amnicola pEracuta Pilsbry and Walker. 



Amnicola peracuta Pilsbry and Walker, Pr. A. N. S. P., 1889, p. 88, pi. Ill, 



fig. 20. 

 Tj'-pe locality : Spivey's Lake, Navarro Co., Texas. 



Genus PALUDESTRINA d'Orbigny, 1841. 



Bythinella Moq.-Tand, 1851. 



Stimpsonia Clessin, Mai. Blatt., XXV, 1878, p. 151. 



Except as noted, all the species referred to Bythinella by Binney belong 

 to this srenus. 



