— 218 — 



fuscidula ; peristoma extus nigricans, marginihus strictim 

 reflexis, columellari paulo magis dilatato. — Diani. maj. 

 23; min. 18; cdtit. 18 mill. 



3. Cyclostoma Crosseancm. 



T. mediocriter umbilicatci, globoso-turbinata, tenuis, 

 subdiapha7ia, lineis spiralibus confertis et strigis exilibns 

 incrementi decussata, carnea, fasciis spadiceis, una infra- 

 peripheriali paulo magis conspicua, et inttis pallide luteis 

 radiantibus clathratula ; spira turbinata, apice lœvi, cor- 

 neo ; unfract. o 1/2 convexi, celeriter crescentes, 3 ultimi 

 carinis 4-5 costulœformibns ornati ; umbilicus pervius^ 

 undique spiraliter sulcatus ; apertura fere circularis, in- 

 tus concolor ; peristoma acutum , marginibus subexpansis , 

 sursuin angulatim junctis. — Operculum testaceum, 

 concaviusculam^ lividum, b-spirale. — Diam. '\ï>;altit. 

 18 millim. 



4. Cyclostoma chromium. 



T. auguste perforata, globoso - turbinata^ tenuiuscula, 

 diaphana, lœvigata, nitide lutea, fusco-rubente unizonata. 

 Spira conoidea, apice violaceo-fusco , obtuso; anfract. 

 5 convexi, ultimus inflatus, infrn zonam carinulis 1-3 exi- 

 lissimis munitus, non descendens ; aperturaparum obliqua, 

 subcircularis, intus concolor; peristoma acutum, breviter 

 expansum, marginibus disjunctis, columellari strictiore. 

 — Opère, testaceum, sordide lividum, planulatum^ i-spi- 

 rale. — Diam. 1 ; altit. 1 k- millim. 



5. iMegalomastoma litturatum. 



T. rimato-perforata, solidiuscula, pyramidalis, vix 

 slriatula, sub epidermide fuguci, aureo-straminea et stri- 



