u 



continuum, album, callosum, superne appressura, caeterum 

 reflexuua. — Long. 31 — 34, diam. 8 mill. Apert. c. perist. 

 9 mill. longa. (Mus. Cuming. et Coli. Nr. 250.) 

 12. Clausilia Sheridani Pfr. (246 a.) 



T. subrimata, fusiformi-turrita, solidula, striata, nitida, 

 saturate castanea; spira a medio subregulariter attenuata, 

 apice acutiuscula; sutura simplex, profunda; anfr. 9 — 10 

 convexi, ultimus angustior, costulato-striatus, solutus, dorso 

 angulatus, basi rotundatus; apertura subobliqua, angulato- 

 piriformis; lamellae parvulae, approximatae ; lunella exigua, 

 remota; plica palatalis 1 elongata, subcolumellaris ad 

 marginem emersa ; perist. continuum , liberum , undique 

 breviter expansum. — Long. 15 — 16 , diam. SV'g mill. 

 Apert. 33/4 mill. longa. (Mus. Cuming. et Coli. Nr. 251). 



ß. Peristomate extus , intusque albo - incrassato , inde 

 apertura coarctata, lamella inferiore et plica subcolumellari 

 vix conspicuis. 



13. Pterocyclos Wilsoni Pfr. (6 a.) 



T. late umbilicata, subdiscoidea , solidula, striatula, 

 nitida, fulva, castaneo dense fulgurata; spira medio vix 

 elevata; anfr. 41/2 modice convexi, ultimus subdepresso- 

 rotundatus, medio linea castanea cinctus; apertura diago- 

 nalis , subcircularis , intus violacescens ; perist. duplex : 

 internum expansiusculum , adnatum , superne vix incisum, 

 externum patens, ad anfractum contiguum productum, tum 

 late inflexum, latere dextro angustius involutum. — Operc? 

 — Diam. maj. 22, min. 18, alt. TVg mill. (Mus. Cuming. 

 et Coli. Nr. 9.) 



Beschreibungen nnd Kritik neuer Mollusken. 

 Von Dr. C. Agardh Westerland. 



Ich nehme mir hiemit die Freiheit, dem conchylio- 

 logischen Publikum die Beschreibungen einiger Land- und 



