Mr. A. Adams on new Mollusca from Japan. 125 



XVIII. — On some new Species of Eulima, Leiostraca, and Ceri- 

 thiopsis f'om Japan. By Arthur Adams, F.L.S. &c. 



Genus Eulima, Risso. 



The smaller species of Eulima, 1 believe, have never been very 

 minutely examined. Only a few species have hitherto been 

 detected in the China Sea, and none are recorded from the Sea 

 of Japan. From the similarity of form and colour (subulate and 

 white) common to all the species, and from the entire absence 

 of sculpture, the study of this genus is very difficult ; and the 

 specific diflfereuces can only be appreciated by making careful 

 outlines of all the species. The only division I could have made 

 in the twenty-one species here indicated would have been into 

 straight and flexuous ; but this being quite an arbitrary character, 

 I have not adopted it. 



1. Eulima robusta, A. Adams. 



E. testa pyramidato-subulata, flexuosa, apice recurvato ; anfractibus 

 convexiusculis, ultimo magno, oblique, ad basin rotundato, suturis 

 marginatis ; apertura ovata, producta ; labio superne incrassato ; 

 labro arciiato. Lactea, semiopaca. 



Hab. Mino-Sima ; 63- fathoms. 



2. Eulima clavula, A. Adams. 



E. testa acuto-pyramidali, apice postice inclinato ; anfractibus 8, 

 planatis, suturis marginatis ; anfractu ultimo lato, ad peripheriam 

 vix angulato, ad basin oblique ; apertura parva, ovata, effusa ; 

 labio incrassato. Lactea, solidiuscula, opaca. 



Hab. Mino-Sima; 63 fathoms. 



3. Eulima pinguicula, A. Adams. 



E. testa acuto-pyramidali, arcuata, apice antrersum inclinato ; an- 

 fractibus 8, convexiusculis, ultimo magno, oblique, ad peripheriam 

 obtuse angulato, ad basin pcrobliquo ; apertura parva, perrecta, 

 ovata; labio tenui, arcuate. Lactea, solida, opaca. 



Hab. Mino-Sima; 63 fathoms. 



4. Eulima curvata, A. Adams. 



E. testa subulata, arcuata, tenui, antrersum inclinata ; anfractibus 7, 

 planatis ; anfractu ultimo elongate, antice prodticto ; apertura 

 elongato-ovali ; labio tenui, curvato. Alba, opaca, solidiuscula. 



Hab. Mino-Sima; 63 fathoms. 



5. Eulima mundula, A. Adams. 



E. testa subulata, tertuesa ; spira lateraliter curvata ; anfractibus 9, 

 convexiusculis, ultimo ample, ad basin obliquo; apertura ovata, 



