— 177 — 



funde impressa; anfr. 5 convexi,ref)ulariter accrescentes, 

 ultimus teres, vix descendens , hasi suhplanalus ; apertura 

 diagonalis, suhangulatim circularis; perist. duplex^ in- 

 ternum brevissime porrectum, juxta anfractum contigimrti 

 sinuatum, externum angustissimum, superne triangulari- 

 ter vix protractum. — Opcrculum? — Diam. niaj. 20, 

 min. 16, ait. 7 mill. (Coll. Crosse.) 



llah. In Indo-China? Species P. Lowiano Pfeifferi ali- 

 quantulwn vicina, sed paulo major, unicolor, cœtcrum 

 apice planato nec mucronato et peristomate externo an- 

 ^astissimo facile distinguenda. 



6. Truncatella cristata. 



T. vixsubrimata, turrito-cijlindracea, truncata, parnm 

 nitens, costis subdislantibus, validis longitudinaliter im- 

 pressa, pallide cinnamomea; sutura impressa; anfr. 

 superst. 5 corivexiusculi, ultimus non descendens, spira 

 multo minor, costis 28-30 impressus^ basi attenuatus; 

 apertura par va, oblique subovata; perist. duplex, inter- 

 num continuum, prominulum, nitidum, lutescens, exter- 

 num incrassatum, vei^sus basin in cristam desinens^ locum 

 umbilicicircumcingentem. — Operculum... ? — Long. 7 1/2^ 

 diam. 2 1/2 mill. Apert. \ 1/2 mill. longa (Coll. Crosse.) 



ffab....? Species. T. porrectœ et T. rostratœ Gouldi 

 vicina, à T. porrecta crista basali, et perist. duplice, à T. 

 rostrata costis redis [ncc obliquis) et magis numerosis dis- 

 tinguenda. 



7. Truncatella Arcasiana. 



T. subimperforata, elongata, cglindraceo-turrita, trun- 

 cata^ costis longitudinalibus , medio anfractuum interdum 

 evanidiSj irregularibus impressa, haud nitens, subcreta- 

 cea, squalide albida; sutura impressa; anfr. superst. G, 



