1882.] 0. F. von Mollendorff — On a coUeofion of Japanese Clausilise. 7 



of CL subgihhera, also of Gl. hyperolia^ v. Mart. The palatal * plicae' are 

 so far up in the shell that they are visible above the aperture, a position 

 for which Ad. Schmidt has introduced the appropriate term " ventralis.'* 

 The same position of the " plicae palatales" occurs in Gl. aurantiaca, Bottg. 

 Our species differs from the group HemipJiaedusa by the immersed sub- 

 columellar lamella, and the absence of a lunella. The small number of 

 specimens prevented the examination of the clausilium, and, as mentioned 

 before, the final classification of this species and Gl. sericina has to be 

 reserved. 



e. Group of ClausiUa pluviatilis, Bens = Semiphaedusa, Bottg. (1. c p. 65). 

 a. Subgroup of ClausiUa validiuseula, v. Mart. 



13. Clatjsilia jethiops, n. sp., PI. I, Fig. 6. 



Testa elongato-fusiformis solida, striata^ ohscure eastaneofusca, anfr. 

 12 suhplani ; apertura subohliqua, ovali-piriformis, peristoma satis incras- 

 satum, vice solutum, rejlexum, alholahiatum. Lamella supera ohliqua, mar- 

 ginalis cum spirali contigua^ infera ohlique ascendens in profundo dextror- 

 sum retorta^ subcolumellaris modica, emersa, marginem attingens. Flica 

 principalis mediocris, sat profunda, palatales tres laterales obliquae quarum 

 media miiior, lunella nulla. Glausilium ? 



Alt. 33, lat. 61^, apert. long , lat. millim. 



Hab. The unique specimen was collected near Nagasaki. 



This fine Glausilia is a near relation of Gl. Hickonis, Bottg., with which 

 is has all the characteristics of the closing apparatus in common. It differs, 

 however, by the habitus (which has nothing of the curious claviform shape 

 of Gl. Ilickonis, but is rather slender), the considerably larger size, the 

 dark brown colour, and some smaller differences of the lamellae and plicae ; 

 so that I do not hesitate to make it a separate species. 



14. CLArSILIA TETEAPTTX, n. Sp., PI. I, Fig. 7. 



Testa fus if or mis, solidula, spird gracilis attenuatd apice acutiusculo, 

 sultiliter costulato-striata, corneofusca ; anfr. 9|^ convexiusculi ; apertura 

 piriformi-ovata, suiohliqioa, marginihus parallelis, peristoma continuum, 

 superne leviter solutum^ leviter incrassatum et expansum ; lamella supera 

 subohliqua, marginal is cmn spirali continua, infera spiraliter recedens,haud 

 furcata, antrorsum complanata, subcolumellaris valida, emersa, marginem 

 attingens. Plica principalis longa, palatales quatuor quarum prima et 

 quarta subaequales majores, mediae subaequales minores. Clausilium satis 

 angustum, antice Jiaud incrassatum, rotundato acuminatum. 



Alt. 17 — 18, lat. 4, apert. long. 4, lat. 3i millim. 



Hab. Fujisawa. 



By the shape of the clausilium and the four palatal plaits instead of 

 a lunella this form belongs to the subgroup of 01. validiuscuLi, v. Mart. 



