ANCEY : SHELLS FROM BOLIVIA AND BRAZIL. 93 



This is a striking form which I refer, with some doubt, to B. 

 pcEcUns. Two specimens I have seen possess just the same style 

 of colouring, shape, and solidity. 



Odontostomus wagneri Pfr., var. paraguayana Anc. 



Differt a typtco wagneri habitu magis ventrico^ spira magis 

 conica, striis costnliformibtts in viedianis anfractibiis confertis 

 distindisque, basi et apice evanidis, apertura viinns quadrata, 

 dentibus tantummodo 3 ; uno parietali, uno colu)nellari 

 simplici, vix torto, pliciformi, tertioqve in margiiie dextro 

 illi fere opposite ; anfr. 12-12^. 



Long. 40, diam. 12, alt. apert. 11 w/7/. 



Corumba, Matto-Grosso, in the basin of the Paraguay. 



Odontostomus lemoinei Anc, n. sp. 



Testa sat gracilis, elongato-attenuata , tetiuiitscitla vel solidiuscula, 

 anguste et oblique perforata, fulvido-g/isea, suhiitida. Spira 

 elongata, regulariter zisque ad suvimum atfeniiata, apice 

 obtusiiiscula. Anfractus 9^ regulariter et paulatini accres- 

 centes, convexiusculi, sutura simplici impressaque discreti, 

 4 vel 5 priini sublceves, seq7ientes costnlis obliquis obsoletis 

 prcediti, inferi pallide et irregulariter verniiculati vel rugiferi, 

 Mltimus attenuatus, circa umbilicum angulatus, haud as- 

 ce?idens, latere dextro deplanatus et scrobiculatus, oblongus, 

 prcecedente vix major. Apertura distincte obliqua, ir- 

 regtilariter oblonga, extus biangulata {superue et inferne), 

 ringens, scilicet ; tiiberculo parietali mediocri, lamelliformi ; 

 plica columellari vix subtorto, simplici, prominente ; dente in 

 interiore maiginis dextri majore et ccBteris opposito ; denique 

 callo incrassato in parte basali declivi et cum dextra angulo 

 juncta. Peristoma prope insertionem strictum, dehinc in- 

 crassatum, album, expansum, ad basin et prcBsertim ad 

 columellani dilatatutn ; marginis callo tenui juncti. 



Long. 22, lat. 6^, alt. apcrt. 6 mill. 



Santa Cruz de la Sierra, Bolivia (Germain). 



Var. brevior. 



Magis abbreviata, relative laiior, apertura major, anfractus 



viodo 9. 

 Long. i8|, lat. (i\, alt. apert. vix 6 mill. 

 Santa Cruz de la Sierra, Bolivia (Germain). 



