ANCEY : SHELLS FROISI BOLlVL\ AND BRAZIL. 95 



cendens, in- umbilico ipso subito hevigatiis vel pLUuiliratus. 

 Umbilicus \ salfefii latitudinis adceqnans^ vel paiilo inagis. 

 Apertura obliqiia, cirmlaris, superne angulata. Peristoma 

 continuum, simplex, anfractui penultimo appressum. Oper- 

 culum fejiue, corneum, extus concavuju, cceterum arctispirale. 

 Diam. maj. 21, ////;/. 16, alt. apert. (obliqiie) yf mill. 

 Santa Cruz de la Sierra, Bolivia (Germain). 



This looks, at first, more like an Ostodes from New Cale- 

 donia and other islands of the South Pacific (as 0. artensis, 

 bocageanus, or guesfieri), than an American species. Its pro- 

 minent lira;, dull colour and deciduous epidermis are its most 

 striking characters. Although quite different, it belongs to the 

 group of C. cumingi. 



I give this shell the name of the great French naturalist 

 and traveller, who first collected shells in that portion of South 

 America, M. Alcide d'Orbigny. 



Helicina leucozonalis Anc, n. sp. 



Testa turbinata, pallide flava, ad apcrturam pallide cameo tin eta, 

 subopacula, nite?is, sub valida lente lineis obliquis in direc- 

 tione/n e dextra ad sinistram, stiiolas increvienti vix distinctas 

 transgredientilms levissime impressa {lineis irregularibus, 

 interruptis, interduni fere deficie^itibus). Spira conica, sub- 

 acuta ; anfractus 5, subplani. sutura lineari, ultinuis a?igulo 

 obtuso zona opace albida notato cinctus, supra convexiusculus, 

 subtus convexus. Apertura subobliqiia, seniihinaris, extus 

 subangulata ; peristoma incrassatum, expansiusculum, pallide 

 lutescens, angulo acuta exferneque mucronulato citni callo 

 columella ri parvo junctnni . Operculum testaceuni, fulvescens. 



Diam. maj. 8, min. 6 J, alt. 6, alt. apert. 4 ;;////, 



Matto-Grosso (Germain). 



In shape it somewhat resembles H. lindeni Pfr., H. trossula 



Morelet, and others from Mexico and Central America, but its 



colour, although not vivid in the three specimens before me, is 



quite different. 



Helicina bourguignatiana Anc, n. sp. 



Testa peraffiuis prcecedenti, sed major, spira elatior, anfractus 5, 

 color uniformiter inteiise luteus, peristoma vivide luteu?n, 

 zona opaca tiltimi anfractus magis conspicua, in penulthno 

 suturam sequens, callum basale magis circumscriptum. 



