— 392 — 



crementi sat distantibus {versus suturam validioribus) 

 sculpta, nitida, rufo-brunnea, ftammis luteis ornata; spira 

 vix elevata; anfr. 6 convexiusculo-plani, regulariter ac- 

 crescentes, ultimus non descendens ; apert. obliqua, rotun- 

 dato-lunaris ; perist. simplex, rectum^ intus violaceum. — 

 Diam. maj. 30, min. 26, ail. \\ mill. 

 Habitat in insulis Salomon dictis. (Cox.) 



2. Hélix ptychophora. 



T. umbilicata, depresso-globosa, tenuis, costis validis, 

 sat distantibus ornata; striœ concentricœ nullœ; spira 

 conica, paulo elevata; anfr. 5 cotivexiusculi, ultimus in- 

 flatus, antice descendens; apert. rotundato-lunaris, obli- 

 qua; perist. album, reflexum; columella breviSy dilatata, 

 umbilicum semi'occultans. — Diam. maj. 18, min. 15 1/2, 

 ait. 10 mill. 



Habitat « Bitter Root Mountains, » et Nebraska, Sta- 

 tuum Unitorum. 



Synonyma. 



H. Townsendiana, Lea, var.,Bland et Cooper. Ann. Lyc. 

 Nat. Hist. of U. S., vol. VII, p. 362. 



H. Townsendiana, Lea, var. minor, Tryon. Mon. terrest. 

 Mollusca of U. S., p. 83, pi. viii, fîg. 6. 



o. Hélix RHYNCHiENA. 



T. imperforata, supra depresso-convexa, infra convexa, 

 carinata, solida, sub-fulva, obsolète granulosa; anfr. 5 

 planiusculi, ultimus inflalus, supra carinam excavatus ; 

 apert. perobliqua, influa angulata, superne in rostrum 

 producta, dente mininio prope carinam armata; perist. 

 isabellinum, late reflexum, marginibus callo tenui junc- 



