334 On tfu gen/us Pompholyx and its Allies, 



Tli- tion was soon called in question by Dr. J. E. Gray, 



Mi-. Binney, and other eminent malacologists, but, from it> ex- 

 treme rarity, up t.. :i very recent period, I have been unable 

 t" • » 1 . r : 1 1 1 1 specimens of tin- soft parts to confirm or disprove the 

 accuracy of t 1 1 • - statement. 



Senas Pompholyx. Lea, 

 Proc. rhil. A. iad. Scl 1856. 

 rotundo-gibbosa, subtus retrorsa, Buperne planulata, non urn- 

 bilicata; spira depressa, apertura amplissiina, Bubrotundata, Hl'iisa; 

 labro acuto; labio incrassato planulato; operculum nullum. 

 The Bpecies of Pompholyx at present known arc as follows : 



Pompliolyv efftisa, Lea. 



P. iji'i'sfi. Lea, Proc. Phil. Acad. Sciences, I8f6, vol. 



viii. p. 80. 



Journ. de Conchyl. 2d, series, ii. p. 208, 1857. II. & 



A. A, Is. c, n. i;,c. Moll. ii. p. tii;., j, 1. 138, fig. 11. 



Binney, L. & V. W. Shells of N. A. part ii. page 71. fig. 



ll'.i. hall, Proc. Cal. Acad. Sci. 1866, p. 266,fig. 28. 



T< tfi parva, striata, rotundo-gibbosa, Bubtenui, efiusa, Luteo-cornea, 



anfractibus trims; Buperne planulatis, inferne convexis; aperture 



sub-rotunda, dilatatA intus albida, tnaculata. 



Sab. Sacramento River, CaL Collection Smithsonian Institution, 



The figure in II. a- A. Adam-. Gen. Elec. Moll. pi. [38, fig. 11, 

 represents tins Bpecies much more characteristically than thai in I'm 

 ney, L* I'. W. si,, of N. Am. 



POmphOlj \ liO.'lll.l, II A A. Adams. 



P. locum i, II. a- A. Ads. Proc. Zool. Sue. of London, 



1863, p. 134. 



r. u i.i belicoidea, depre a, tenui, epidermide riride obtecta, spira 



parva; anfr. '-'.', ; oonvi i . rapide accrescentibus, ultimo permagno ; 



apertura panda: labio planru culo, arcuato : labro simplici, acuto. 



Ah. \\ lines. Lat. 2\ lines. Hal.. Wesl Columbia. OolL II. 



A 'lams. 



