— 229 — 



tula, glabra, nitida, albido-cerea ; spira lateralis, obtusa ; 

 anfr. 6 1/2 convexiusculi, embryonales 1 1/2 lœvigati, se- 

 quentes tenuissime striatuli, ultimus antrorsum devians, 

 antice rotundatus, lœvis; perforatio sut magna, nonper- 

 vîa; aperturaper obliqua^ irregulariter subquadratO'Semi- 

 ovalis, lamella parum intrante parietis aperturalis 

 coarctata; perist. late expansum, reflexum, crassiuscu- 

 lum, album, margine columellari subobliquo, cum basait 

 incrassato angulum obtusum formante, supero antrorsum 

 arcuato, valide unidentato. — Diam. maj. 13 1/2, min. \\, 

 ait. 8 1/2 mill. (coll. Crosse). 

 Hab. Chili (teste B. Wright)? 



S. comboides, d'Orbigny, Boliviœ incola, nostrœ speciei 

 valde affinis. S. decipiens differt testa majore, magis 

 ventricosa, minus angusteperforata, dente marginis superi 

 vahdiore, apertura quasi subquadrata propter angulum 

 marginalem^ etc. 



2. Leptopoma achatindm. 



T. perforata, globoso-conica, tenuis, suboblique et obso- 

 letissime ruguloso-striatula, nitida, pellucida, viridulo- 

 lutea; spira conoidea, subacuta, apice obtusulo; anfr. 5 

 convexi, celeriter accrescentes, primi 2 spiraliter rare 

 lirati, ultimus globosus, spiram superans, leviter descen- 

 dens, angustissime perforatus; apertura obliqua, circu- 

 laris; peristoma simplex, subacutum, breviter expansum, 

 albidum, marginibus conjunctis, columellari dilatato , 

 leviter protracto. — Operculum? — Diam. maj. \\, 

 min. 9, ait. 10; diam. ap. 6 mill. (coll. Crosse). 



Hab. in insuUs Philippims? 



3. COLUMBELLA ISABELLINA. 



T. imperforata, elongato-fusiformis, lœvis, sub epider 



