BEMBIX-CHLOROSTOMA. 163 



slightly concave contour, the lines of which are hardly swollen out 

 by the slight tumidity of the last whorl. Apex eroded, but evi- 

 dently small. Whorls 7 or 8, of regular increase, quite flat on the 

 side slopes, except the last, which is very slightly constricted below 

 the suture, a very little tumid on the upper slope, sharply carinated 

 but not much angulated at the suture, and very tumid on the base. 

 Suture linear, strongly defined on the upper whorls by the square 

 furrow lying between the lines of tubercles which marginate the 

 suture above and below. On the last whorl it becomes slightly 

 pouting from the projection of the carina and the slight infra- 

 sutural constriction. Mouth nearly square, very little oblique in 

 the line of its advance, but standing out a little obliquely to the 

 axis of the shell. Outer lip thin, not descending:. Pillar lip thin, 

 spread out broadly at its base over the umbilicus, which it largely 

 conceals, with a deep narrow furrow behind it. Curving over to 

 the right, it advances, thin and pointed, to its angular junction with 

 the basal lip. Umbilicus defined by a spiral thread and with two 

 other spirals within it. It is not small but concealed by the pillar- 

 lip. 



Alt. 0'82 in. ; diam. O63 in. ; mouth, heigth O4 ; breadth 038 in. 

 ( Watson.) 



It is evidently not remote from Trochns aryent.eonitens, Lischke 

 (Japan. Mee res-Conch., vol. iii, p. 67), a species I know only from 

 the figure and description. The whole sculpture, however, seems 

 distinct though similar. (Watson.) 



Off Japan in 565 fms. 



J3. ceola WATSON, Journ. Linn. Soc. London, xiv, p. 603 (1878) ; 

 Challenger Gasteropoda, p. 95, t. 7, f. 13. 



Genus CHLOROSTOMA Swainson, 1840. 



Chlorostoma SWAINS. Malacol., p. 350. PHILIPPI, Handb. der. 

 Conchyl. u. Mai., p. 209. A. AD. (in part), P. Z. S. 1851, p. 180. 

 GRAY, Guide Syst. dist, Moll. Brit. Mus., p. 154. H. and A. AD. 

 Gen. Rec. Moll, i, p. 428. TRYON, Struct, and Syst. Conch, ii, p. 

 311Ompkalius PHILIPPI, Zeitschr. f. Mai. 1847, p. 21 ; Handbuch, 

 p. 210. GRAY, Guide Syst. dist., p. 154. TRYON, S. and S. Conch., 

 p. 310. H. and A. AD., Genera, p. 429. TROSCHEL, Das Gebiss 

 der Schnecken, ii, p. 232. Neomphalius FISCHER, Manuel de Cuc- 

 chyl., p. 821 (1885). Phorcus A. AD. Monog. Trochida?, P. Z. S. 

 1851, p. 156 (not Phorcus Risso). Tegula LESSON, Illust. de 



