HELIX.— Plate CC. 



sliining; spire flut; suture clmnncllcd; whorls eleven, 

 very narrow, obsolelcly jilicately striated ; aperture 

 vertically lunar, small, lip slightly thickened. 



Albeus, Zeitschrift fiir Malac. 1854. 



llab. Banks of the Marauon River, Columbia. 



Singularly eharncterized by its numerous discoidal 

 closely convoluted whorls. 



Species 1409. (Mus. Cuming.) 



Helix Annatonensis. Itel. testa mbprofunJe subper- 

 sped'we umbilicata, depressu, peHucido-coniea, niteiite; 



ipird ohtuto-contexd ; anfractUiM quinque, conctiiut- 

 ciilU, infra rutundatu ; aperlurd Miqui tuKari, tabro 

 timplici. 



The Annaton Helix. Shell rather deeply subpersiiec- 

 tivcly umbilicnlcd, depressed, transpan-nt-homy, 

 shiuingi spire obtusely convex ; whorls five, slightly 

 convex, rounded beneath ; aperture obliquely lunar, 

 lip simple. 



Pfeifkek, Pro. Zool. Soc. November, 1854. 



Jlab. Isle of Annaton, New Hebrides ; Macgillivray. 



A transparent horny species, of simple growth, of few 

 whorls, with a rather conspicuous umbilicus. 



