Mr. A. Adams on new Molhtsca from China and Japan. 141 



moreis ; tentaculis anterioribus latissimis, truncatis ; tentaculis 

 posterioribus sublinearibus, obtusis. Testa magna, tenui, fragili, 

 antice valde dilatata ; apice vix involuto, subincrassato. 



Hab. Mah-lu-San (Port Hamilton) ; tidal pools ; caught also in 

 the sein. 

 A large species; sometimes 10 inches long. 



2. Aplysia marginata, A. Adams. 



A. dorso elevato ; lobis pedis magnis, dilatatis, marginibus albo, 

 deinde fusco marginatis ; rufo-fusca, brunneo variegata et punc- 

 tata ; tentaculis anterioribus latis, brevibus, truncatis ; tentaculis 

 posterioribus parvis, subacutis. Testa fragili, tenui, semimem- 

 branacea, subtriangulari, antice dilatata ac rotundata ; apice vix 

 involuto. 



Hab. Mah-lu-San (Port Hamilton) ; pools in rocks ; low water. 



Subgenus Phycophila, A. Adams. 



Corpus compressum, elongatum ; pedis solea angusta. Testa elon- 

 gata, oblonga, tenui, plana, membranacea ; apice non involuto. 



3. Aplysia {Phycophila) euchlora, A. Adams. 



A. viridis, lsevis, compressa ; solea angustata ; tentaculis anterioribus 

 elongatis ; tentaculis posterioribus angustis, apicibus truncatis ; 

 cauda producta. Testa membranacea, oblonga, antice dilatata ; 

 apice non involuto. 



Hab. Straits of Tsugar or Tseuka (crawling on floating Zos- 

 tera). 



This animal I have observed before, during the voyage of the 

 ' Samarang.' It is figured in Mrs. Gray's ' Figures of Mollus- 

 cous Animals' (tab. 179. fig. 1); it has not, however, been 

 described. It is oceanic in its habits, or at least found at some 

 distance from the shore. Aplysia ocellata, A. Ad., figured also 

 from my drawing in Mrs. Gray's work, is another species of this 

 subgenus. 



Genus Helicina, Lamarck. 



Helicina japonica, A. Adams. 



H. testa depresso-conica, crassa, solida, fusco-lutescente, oblique 

 crebre striata ; anfractibus 3^, convexiusculis ; apice obtuso ; au- 

 fractu ultimo ad peripheriam rotundato ; basi convexa, callo tenui 

 nitido obtecta ; apertura semiovata, perobliqua ; columella brevi, 

 crassa, rotundata ; peristomate duplicato, interiore tenui, recto, 

 exteriore crasso, rotundato, reflexo. Operculum semiovatum, tenu?, 

 calcareum. 



Hab. Tabu-Sima (damp banks, roots of trees). 



