172 



ginata : apertura lunata, labro simplici ; columella superne valde 

 intorta, sinum an2;ustum centralem formante. 



Very similar to H. suhrutila, Mighels, but is distinguished from 

 it by the want of revolving strise, and by the manner in which 

 the columella joins the whorl above. 



Helix cultrata. T. parva, orbicularis, depressa, glaber- 

 rima, lucida, fusco-viridis, infra rotundata, in foveam umbilica- 

 lem devexa, imperforata : spira anfr. 5 convexis, ultimo superne 

 carinato ; apice obtuso ; sutura marginata : apertura angusta, lu- 

 nata, labro simplici ; columella obliqua, callosa, alba, planulata, 

 inflexa, inferne dentem simulante. Lat. :^-^, alt. yV po^l* Hah. 

 Taheiti and Eimeo. 



A beautiful, smooth, lenticular, dark-green shell, not unlike H. 

 interna, Say, distinguished by its curious broad, white, inflected, 

 columellar lip. 



Helix pertenuis. Testa minuta, subglobosa, pellucida, nitidis- 

 sima, viridi-aurea, imperforata : spira depressa, anfr. 4} con- 

 vexis, ultimo amplo, ad peripheriam angulato, infra sulcis remotis 

 radiato : apertura ampla, lunata ; labro simplici. Lat. |, alt. yV 

 poll. Hah. Aurora Island. 



A small Matea, or very pellucid shell, somewhat like H. elec- 

 trina and lucida, but more globular.. 



Helix gradata. Testa parva, planorboidea, tenuis, nitida, 

 rufo-viridis, luteo radiatim variegata, supra depressa, infra aceta- 

 buliformis : spira anfr. 5 convexis, intra umbilicum angulatis, 

 oblique et confertim striatis et cum striis interruptis volventibus 

 decussatis ; ultimo subangulato, versus aperturam deflexo ; sutura 

 canaliculata : apertura obliqua, subcircularis ; labro acuto, ad um- 

 bilicum reflexo. Lat. -J, alt. ^ poll. Hah. Tongataboo. 



Shape and size of H. strialella, Anthony, but has the umbili- 

 cus broader, deeper, and more shelving. 



Helix fornicata. Testa parva, planorboidea, tenuis, dilute 

 rufa, supra convexiuscula, infra concava, oblique ordinatim et 

 confertim costato-striata : spira anfr. 4 convexis ; ultimo ad peri- 

 pheriam rotundato ; sutura profunda : apertura transversa, rotun- 

 dato-elliptica. Lat. I, alt. yV P^H. Hah. Kauai, Sandwich Is- 

 lands. 



A small, dome-shaped shell, marked like H. striatella, but 

 more like H. indentata, in the form of the spire. 



