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The operculum is very thin, light yellow, with about 1 2 whorls, which under the microscope 

 show fine radiating and spiral striae, which by their intercrossing, give a somewhat beaded 

 appearance to the outer surface. 



The animal has a brown mufle, the tentacles are moderately long, whitish, articulated 

 with brown, the eyes black, with white rings. I see two cirri on each side of the epipodial line, 

 but their number may have been larger, as the end of the foot has been lost. 



The rhachidian tooth (R) has an elongated triangular body, with a small tricuspid cusp ; 

 the first (i), second (2) and third (3) laterals, have also elongated bodies and a cusp with a 

 larger denticle, and smaller ones at the proximal and distal sides, one or two on the proximal 

 side, depending perhaps on the position of the tooth, and invariably two on the distal side ; the 

 fourth (4) and fifth (5) have one denticle on the proximal side; the fourth two, the fifth three 

 denticles on the distal side, their bodies are quadrangular. Of the numerous uncini the outer 

 ones have two denticles, the other seem to have but one; these become smaller towards the 

 margin of the radula, those of the median part, on the contrary, become larger from the centre 

 towards the uncini. Number of rows about 33. 



2. Cantharidus articiilaris Adams. 



A. Adams. Proc. Zool. Soc. Lond. 185 1, p. 170. 

 PiLSBRY. Man. of Conch. Vol. XI, p. 150. 



Stat. 109. Pulu Tongkil, Sulu-Archipelago. 23 M. Lithothamnion-bottom. i Spec. 



Unfortunately the only specimen is a small, dead shell, not fit for figuring, the peripheral 

 lirae of each whorl are slightly prominent and striated, the base has about seven lirae besides 

 a few intermediate ones. 



3. Cantharidtis (Thalotia) elongahis Wood. 



Wood. Ind. Test. Suppl. PI. 5, fig. 19. 



KlENER. Coq. Viv. Trochus, p. 281, PI. 92, fig. I. 



PiLSBRY. Man. of Conch. Vol. XI, p. 143, PI. 45, fig. 56. 



Stat. 81. Pulu Sebangkatan, Borneo-bank. 34 M. Lithothamnion-bottom. i Spec. 



Stat. 240. Banda. 9 — 45 M. Lithothamnion-bottom. 2 Spec. 



Stat. 282. Between Nusa Besi and N.E. point of Timor. 27 — 54 M. Lithothamnion-bottom. 2 Spec. 



Stat. 315. East of Sailus Besar, Paternoster-islands. Up to 36 M. Lithothamnion-bottom. i Spec. 



Only the specimen from Stat. 81 is adult, the largest of the remaining 5 specimens 

 having only a length of 13 Mill. 



4. CantharidtLS (Thalotia) polychroma Adams. 



A. Adams. Proc. Zool. Soc. Lond. 185 1, p. 168 [Zizyphinus). 



Reeve. Conch. Ic. Vol. XIV, Zizyphinus, fig. 40. 



PiLSBRY. Man. of Conch. Vol. XI, (Calliostoma), p. 356, PL 17, fig. 31. 



Stat. 215. 1300 M. from N. point of Kabia-island. Reef, i Spec. 



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