240 Mr. A.Adams on new Molluscafrom China and Japan. 



2. Leiostraca Oheron, A. Adams. 



L. testa parva, pyramidali-subulata, alba, opaca, quasi pruinosa; 

 anfractibus circa 8, planis, ultimo magno, ad peripheriam ro- 

 tundato, ad basin producto ; apertura ovata, antice subeffusa ; 

 labio recto, subincrassato. 



Hah. Shan-tung (Kala-hai). 



3. Leiostraca Titania, A.Adams. 



L. testa parva, subulato-pyramidali, sordide alba, semipellucida ; 

 anfractibus circa 9, planis, suturis marginatis ; anfractu ultimo ad 

 peripberiam vix angulato ; apertura ovata ; labro in medio sub- 

 angulato. 



Hah. Shan-tung (Kala-hai). 



4. Leiostraca Maria, A. Adams. 



L. testa recta, subulata, solida, vix o[)aca, lactea ; anfractibus circa 1 1, 

 convexiusculis, varicibus obsoletis instructis, suturis subirregulari- 

 bus ; anfractu ultimo elongate, ad peripheriam rotundato ; aper- 

 tura ovata, antice producta ; labio calloso. 



Hah. Gulf of Pe-chili; 3 fathoms (mud). 



5. Leiostraca Constantia, A.Adams. 



L. testa subulata, tenui, sordide alba, semiopaca ; anfractibus circa 9, 

 planiusculis, suturis marginatis ; anfractu ultimo subventricoso, 

 antice producto ; apertura lanceolato-ovata, postice acuminata, 

 antice dilatata ; labio incrassato. 



Hah. Lian-tung (Hulu-Shan Bay) ; 3 fathoms (sand and shells). 



6. Leiostraca casta, A. Adams. 



L. testa recta, tenui, subulata, alba, semipellucida ; anfractibus circa 

 11, planiusculis, suturis marginatis; anfractu ultimo elongato, ad 

 perif)heriam rotundato ; apertura ovata, postice acuminata, antice 

 vix effusa ; labio subincrassato. 



Hah. Shan-tung (Hwang) ; Lian-tung (Hulu-Shan Bay) ; 3 fa- 

 thoms. 



7. Leiostraca lentiginosa, A. Adams. 



L. testa lanceolato-pyramidali, compressiuscula, semipellucida, sor- 

 dide alba, maculis parvis rufo-fuscis numerosis irregularibus con- 

 fertis ornata ; anfractibus 0^, planis ; apertura elongato- ovata ; 

 labio incrassato. 



Hah. Shan-tung (Lo-shan-kow). 



Genus Bissoella, Gray. 



1. Rissoella sinensis, A. Adams. 



R. testa helicoidea, profuude umbilicata, alba, semiopaca, nitida, ob- 



