334 
Oli thè genus Pompholyx and its Allies, 
The assertion was soon called in question by Dr. J. E. Gray. 
Mr. Binney, and other eminent inalacologisfs, but, from its ex- 
treine rarity, np to a vei-y recent period, I bave been nnable 
to obtain speciinens of tlie soft parts to confirra or disprove tlie 
accuracy of thè statement. 
Geli 11 $ Pompholyx, Lea. 
Proc. Pliil. Acad. Sci. 1856. 
Testa roPuìdo-gibbosa, subtus retrorsa, superne planulata, non um- 
bilicata ; spira depressa, ajjertura amplissima, subrotundata, effusa ; 
labro acuto ; labio incrassato planulato ; operculum niillum. 
The species of Pompholyx at present known are as follows : 
Pompholyx efTiisa, Lea. 
P. effusa, Lea, Proc. Phil. Acad. Sciences, 18f6, voi. 
vili. p. 80. 
Joui’n. de Conchyl. 2d series, ii. p. 208, 1857. H. & 
A. Ads. Gen. Ree. Moli. ii. p. 645, pi. 138, fig. 11. 
Binney, L. & F. W. Shells of N. A. part ii. page 74, fig. 
119. Dall, Proc. Cai. Acad. Sci. 1866, p. 266, fig. 28. 
Testà parva, striata, rotundo-gibbosà, subtenui, effusa, luteo-corneà, 
anfractibus trinis ; supernè j^lamilatis, infernè convexis ; apex'turà 
sub-rotundà, dilatata yutus albidà, maculata. 
Hab. Sacramento River, Cai. Collection Smithsonian Institution, 
&c. ^ 
The figure in H. & A. Adams, Gen. Ree. Moli. pi. 138, fig. 11, 
represents this species mudi more characteristically than that in Bin- 
ney, L. & F. W. Sh. of N. Am. 
Pompholyx liCaiia, H. & A. Adams. 
P. leana, H. <fe A. Ads. Proc. Zool. Soc. of London, 
1863, p. 434. 
P. testà helicoidea, depressa, tenui, epidermide viride obtecta, spii-a 
parva ; anfr. ; convexis, rapide accrescentibus, ultimo permagno ; 
apertura patula ; labio planiusculo, arcuato ; labro simplici, acuto. 
Alt. 1^ lines. Lat. 2|- lines. Hab. West Columbia. Coll. H. 
Adams. 
