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



several species not mentioned in my former communications, 

 which I now beg to bring before the notice of malacologists. 



Genus Parthenia, Lowe. 



1. Parthenia mundula, A. Adams. 



P. testa ovato-conoidea, rimata, solida, alba ; anfractibus normalibus 

 4, planiusculis, longitudinaliter plicatis, plicis angustis subobli- 

 quis, iiiterstitiis transversim elevatim striatis ; anfractu ultimo 

 magno, rotundato ; apertura ovata, antice producta, postice acumi- 

 nata ; plica parietali superiore, valida, conspicua. 



Hab. Sado Island; 30 fathoms (Nullipore bottom). 



2. Parthenia costellata, A. Adams. 



P. testa elevato-conica, imperforata, solida, sordide alba ; anfractibus 

 normalibus 4, planis, longit'.idinaliter costellatis, costellis validis ; 

 anfractu ultimo ad peripheriam evanidis, basi laeviusculo ; apertura 

 ovata; plica parietali valida, transversa, mediana; labro sub- 

 incrassato. 



Hab. Tsu-Sima; 26 fathoms (sand and shells). 



3. Parthenia litforalis, A. Adams. 



P. testa ovato-conica, cornea, semipellucida, tenui; anfractibus 

 normalibus 5, planiusculis, longitudinaliter costatis, costis crassis 

 rectis subdistantibus, ad suturas abrupte evanidis ; anfractu ultimo 

 costis ad peripheriam in zonulam moniliformem desinentibus, basi 

 Isevi ; apertura oblonga, antice producta ; labio recto ; plica parietali 

 vix celata, superiore, obliqua ; regione umbiUcali impressa. 



Hab. Tsu-Sima; on oysters, at low water (rocks). 



Genus Odostomia, Fleming. 

 Odostomia hyalina, A. Adams. 



O. testa ovato-conica, rimata, tenui, alba, semipellucida ; anfractibus 

 normalibus 3, laevibus, couvexiusculis ; anfractu ultimo ventricoso ; 

 apertura oblonga ; labio rectiusculo, superne tortuoso ; plica parie- 

 tali inconspicua, vix celata, perobliqua, superiore. 



Hab. Miuo-Sima, Korea Strait; 63 fathoms. 



Genus Auriculina, Gray. 

 1. Auriculina ovalis, A. Adams. 



A. testa ovata, imperforata, soHdiuscula, alba, semiopaca ; anfractibus 

 normalibus 3, couvexiusculis, transversim tenuissime striatis ; an- 

 fractu ultimo amplo, elongato ; apertura oblongo- ovata, antice 

 dilatata, postice acuminata ; labio simplici, arcuato, subincrassato. 



Hab. Mino-Sima ; 63 fathoms. 



