TT Xff T T *X. r T V 'Xff "XT JG" T T~\ '1* ^ O 



J7 A ^1 1 1_* X i- X -1 -^ - T* X JU* - lL y * 



Bering Id., Commander Islands, Bering Sea! Kadiak Island, 

 Alaska ! ponds near Yakutat Bay, Alaska (Kincaid) ! Fort Simpson, 

 Mackenzie River (Kennicott) ! near Brandon, Manitoba (Christy) ! 

 Oregon (Xuttall) ; Hannah Bay (out of James Bay) 

 near Moose Factory ! A 



Specimens absolutely identical with those from Eu- \A 



rope have been collected from the indicated localities. 

 It is quite likely that some of the specimens reported ^ IG> 49- 



by collectors under the name of humilis or desidiosa 



* Muller. (Euro- 



may have belonged to this species. The form called pean specimen. ) 



ferruginea by Haldeman seems to differ only by 

 having the pillar lip more closely appressed, a character which any 

 large series will show to be inconstant in individuals among them- 

 selves as well as in the same indi vidual in different stages. 



Lymnaea (Galba) humilis Say. 



Lymneus humilis SAY, Journ. Acad. Xat. Sci. Phila,, II, p. 378, 1822 (South 



Carolina). 

 Limnea humilis (SAY) HALDEMAN, Mon. Limn., p. 41, pi. 13, fig. i, 1842 



(syn. exclus.). BINNEY, Land and Fw. Sh. N. Am., 



II, p. 63, fig. 99, 1865. 



r~ Range. From Georgia and Kansas northward. 



\J) Lake Superior ; Lake Winnipeg ; Brandon ; and Pem- 



bina Mt., Manitoba. 



I have been unable to examine any authentic speci- 



ncea humtlts 



Say. (Typical.) mens from north of Lat. 49, and the above localities 

 are cited from the literature. 



Lymnaea (Galba) desidiosa Say. 



Lymneus dtsidiosus SAY, Journ. Acad. Nat. Sci. Phila., n, p. 169, 1821 



(Cayuga Lake, N. Y.). 

 Limneus desidiosus SAY, Am. Conch., vi, pi. 55, fig. 3, A 



1834- (\ 



Limnea desidiosa HALDEMAN, Mon. Limn., p. 31, pi. x, ly/i 



1842 (ex parte). BINNEY, Land and Fw. Sh. N. Am., \J 



II, p. 49, fig. 68, 1865. FlG . SI- Lym _ 



Range. Northern L T nited States and northward. n<Ka desidiosa 

 Red Deer and McLeod, Alberta. Lower Saskatch- ( 6russa ) Sav. 

 ewan near Lake Winnipeg : Brandon ; Manitoba. Osoyoos Lake, 

 British Columbia ( J. K. Lord fide P. P. Carpenter) . 

 The above localities are cited from the literature. 



Lymnaea (Galba) galbana Say. 



Lymneus galbanus SAY, Journ. Acad. Nat Sci. Phila., v, p. 123, 1825 (New 

 Jersey Pleistocene). 



