112 Mr. E. A. Smith on Gasteropoda 



alba ; anfractus 4|, convexiusculi, liris vel potius carinis 3-4 (in 

 anfr. ultimo circiter 12, iis infra medium quam cseteris tenui- 

 oribus) succincti ; umbilicus albus, parvus ; apertura magna, 

 circularis, margaritacea ; columella alba, supra umbilicum ali- 

 quanto reflexa, labro callo tenui juncta. 



Operculum corneum. 



Diam. max. 4 mill., diam. min. 3^, axis 3|> 



Hal. Lat. 41° 12' N., long. 140° 45' E., in 43 fathoms, 

 bottom sand and mud. 



This veiy pretty species is at once recognized by its green 

 pearly surface and the black-dotted spiral keels. The above 

 description shows that this species varies as regards form and 

 the perforation. 



84. Troclius (Chlorostoma) turbinatus, A. Adams, 

 Proc. Zool. Soc. 1851, p. 182. 



Chlorostoma ruqatum, Gould, Proc. Bust. Soc. Nat. Hist. 1861, vol. viii. 

 p. 20 ; OtiaConck. p. 158. 



Hab. Toba, South Niphon. 



The only difference I can observe between Gould's species 

 and that described by Adams is, that the base of the former 

 is more finely spirally lirated than that of the latter, which 

 has only five or six strong lirations. 



85. Trochus {Chlorostoma) subfuscescens, Schrenck, Reisen im 

 Amurlande, p. 350, pi. xv. f. 3-10. 



Hab. Ooshima and Endermo, Yesso. 



86. Trochus (Chlorostoma) xqnthostt'gma, A. Adams, 

 Proc. Zool. Soc. 1851, p. 183. 



Trochus nigricolor, Dunker, Moll. Japon. p. 22, pi. iii. f. 2; Lischke, 

 Japan. Meer.-Conck. pi. vii. f. 1, 2. 



Hab. Ooshima, on the shore. 



Although Mr. Adams does not state in whose collection the 

 type of this species is, in all probability it belongs to the 

 Cumingian, where several specimens are labelled " xantho- 

 stigma" one of which suits the description very well with 

 regard to the " basi concentrice lirato luteo-carneolo ; regione 

 umbilicali callo luteo obtecta." In the remaining specimens 

 the umbilical callosity is of a greenish colour, and the basal 

 spiral lirations are almost obsolete. 



