On neio MoUusca from Japan. 445 



LI. — New MoUusca of the Genera Pleurotoma (Surciila), 

 Oliva, and Limopsis from Japan. By G. B. Sowerby, 

 F.L.S. 



[Plate XVIII.] 



Pleurotoma {Surcula) mirabUis. (PI. XVIII. fig. 1.) 



Testa elongato-fusiformis, albida, flammis fuscis obliquis latiusciilis 

 ornata, spiraliter liris numerosis anguetis munita, longitudinaliter 

 oblique subtilissirae striata ; anfractiis 12, superne leviter con- 

 cavi, deinde convexiusculi ; anfractus ultimus | longitudinis 

 testae vix a^quans, supra convexiusculus, deinde convexus, infra 

 elongatim productus ; apertura oblongo-ovata, peristoma acutum, 

 arcuatum, postice late sin uatum ; caualis elougatus, latiusculus ; 

 columella l^vis, rectiusoula. 



Long. 95, maj. diam. 24 mm. 



Hab. Nagasaki, Japan. 



The broad brown longitudinal flames give this shell a 

 handsome appearance. Its nearest ally is P. australis, from 

 which it differs not only in ornamentation, the whorls being 

 less swollen, the body whorl lunger, and the sculpture finer. 



Oliva concavospira. (PI. XVIII. fig. 2.) 



Testa oblongo-cylindracea, crassa, straminea, lineis angulatim undu- 

 latis longitudinaliter ornata ; spira concavo-depressa, callosa ; 

 Butura anguste canaliculata ; apertura mediocriter lata, intus 

 pallide eaerulescens ; peristoma crassiusculum, postice acute 

 elevatum ; columella ubique crassi-plicata, callo postico elevato. 



Long. 35, maj. diam. 10 mm. 



Hah. Loo Choo. 



This species exhibits a very unusual character, the spire 

 being sunk in a concavity below the shoulder of the body- 

 whorl. 



Limopsis tajima;. (PI. X^'III. fig. 3.) 



Testa obliqu'i ovalis, dei)ressa, concentrice lirata, obscurissimo 

 radiatim striata; periostracum tenue, fuscum, radiatim tcnuiter 

 pilosum ; umbones paulo elevati. Pagina interna Isevis, alba; 

 fossula ligamentali latiuscula; cardo mediocriter lato, dentibus 

 circiter 1.5 irregularibus. 



Diam. antero-post. 28, umbono-marg. 23 mm. 



Hah. Tajima, Sea of Japan, 



This shell somewliat resembles L. zonalis, Ball ; the 

 radiating rows of hairs in the periostracum are much closer 

 and thinner. 



