304 Mr. A. Adams on new Mollicsca from China and Japan. 



antice Integra, dilatata, rotundata, postice acuta; labio supeme 

 plica obliqua valida instructo. 



The shells composing this group will not arrange themselves 

 under Odostomia, Monoptygma, Myonia, or any other genus of 

 Pyramidellidse. The following are the species already described, 

 of which A. Virgo may be considered the type : — 



1. Amathis virgo, k..k^'sxi\%. 



Myonia virgo, A. Adams (Ann. & Mag. Nat. Hist. 1860). 

 3. Amathis producta, A. Adams. 



Odostomia producta, A. Adams (Ann. & Mag. Nat. Hist. 1860). 



3. Amathis eburnea, A. Adams. 



Menestho eburnea, A. Adams (Ann. & Mag. Nat. Hist. 1860). 



4. Amathis concinna, A, Adams. 



Menestho concinna, A. Adams (Ann. & Mag. Nat. Hist. 1860). 



5. Amathis pellucida, A. Adams. 



Menestho pellucida, A. Adams (Ann. & Mag. Nat. Hist. 1860). 



6. Amathis subula, A. Adams. 



Menestho subula, A. Adams (Ann. & Mag. Nat. Hist. 1860). 



Genus Lacuna, Turton. 

 1. Lacuna [Epheria] decor ata, A.Adams. 



Ij. testa oblongo-conoidea, rimato-umbilicata, tenui, transversim 

 striata, fasciis tribus rufo-fuscis cincta, strigis rufo-fuscis distanti- 

 bus longitudinalibus ornata; anfractibus 3^, convexis, ultimo 

 infra peripheriam obtuse angulato ; apertura ovata, spiram vix 

 sequante ; rima umbilicali latiuscula. 



Hah. Rifunsiri (on the shore). 



This species is neither L. carinata, Gould (which I believe I 

 have found in the Yellow Sea), nor L. carinifera, A. Adams, 

 which 1 have described from Borneo. It diflfers from any figured 

 in M. Philippics Monograph of the genus. Besides the red- 

 brown transverse bands, the shell is marked with distant red- 

 brown longitudinal stripes. 



2. Lacuna inflata, A. Adams. 



L. testa oblongo-ovata, conoidea, umbilicata, tenui, lutescente ; spira 

 parva ; anfractibus 4\, convexis, striis incrementi longitudinalibus 

 et lineolis elevatis creberrimis transversis decussatis ; anfractu ulti- 

 mo ventricoso, ad peripheriam rotundato ; apertura patula, ovata ; 

 rima umbilicali angusta. 



Hab. Rifunsiri (on the shore). 



A thin ventricose yellowish shell with a short small spire, and 



