The specimens, as usual, vary much in colour-pattern, less so in shape and sculpture, 

 however the specimens from Stat. 306 are considerably different by their much less prominent 

 keel, especially in the lower whorls, where it is double; these specimens may belong or come 

 very near to the variety mentioned by Smith from the Arabian sea, off Gujerat (Ann. and Mag. 

 Nat. Hist. Ser. 6, Vol. XVI, 1895, p. 263). In the upper whorls the difference is less prominent. 



6. Pleurotoma ( Hemipleurotonia) cingiUifera Lamarck. 



Lamarck. An. s. vert. Ed. II, Vol. IX, p. 350. 



KlENER. Coq. Viv. Vol. IV, Pleurotoma, p. 17, PI. 17, fig. i. 



Reeve. Conch. Ic. Vol. I, Pleurotoma, fig. i. 



Weinkauff. Martini-Chemn. Conch. Cab. Ed. II, Vol. IV, Pleurotoma, p. 13, PI. 2, fig. 8, 9; 



PI. 4, fig. 8. 

 Tryon. Man. of Conch. Vol. VI, p. 166, PI. 3, fig. 23. 



Stat. 89. Palu Kaniungan ketjil. Reef, i Spec. 



The only specimen, without columellar margin, appears to have been inhabited by a 

 hermit-crab. 



7. Pletirotonia (Hemipleurotoma) cryptorhaphe Sowerby. 



SOWERBY. Cat. Tankerv. Suppl. p. 14, N^ 1503. 



KlENER. Coq. Viv. Vol. IV, Pleurotoma, p. 12, PI. 7, fig. i [Woodii). 



Reeve. Conch. Ic. Vol. I, Pleurotoma, fig. 7. 



Weinkauff. Martini-Chemn. Conch. Cab. Ed. II, Vol. IV, Pleurotoma, p. 20, PI. 4, fig. 4 — 7. 



Tryon. Man. of Conch. Vol. VI, p. 168, PI. 3, fig. 30, 31. 



Stat. 99. North-Ubian, 16 — 23 M. Lithothamnion-bottom. i Spec. 



8. Pleurotoma (Hemipleurotoma) jubata Hinds. 



Hinds. Proc. Zool. Soc. Lond. 1843, p. 37. 



Reeve. Conch. Ic. Vol. I, Pleurotoma, fig. 52. 



Weinkauff. Martini-Chemn. Conch. Cab. Ed. II, Vol. IV, p. 92, PI. 20, fig. i, 3. 



Tryon. Man. of Conch. Vol. VI, p. 171, PL 4, fig. 46. 



Stat. 204. Between islands of Wowoni and Buton, Northern entrance of Buton-strait, 75 — 94 M. 

 Sand with dead shells, i Spec. 



The only specimen is a bleached shell. 



9. Pleurotoma (Hemipleurotoma) actitigemmata Smith. 



Smith. Ann. and Mag. Nat. Hist. Ser. 4. Vol. XIX, 1877, P- \^9- 



Tryon. Man. of Conch. Vol. VI, p. 171 {jubata pars). 



Smith. Ann. and Mag. Nat. Hist. Ser. 7, Vol. XIII, 1904, p. 457. 



Stat. 47. Bay of Bima, near South fort. 55 M. Mud with patches of fine coralsand. i Spec. 

 Stat. 164. i°42'.5 S., I30°47'.5 E. Near West-New-Guinea. Sand, small stones and shells. 3 Spec. 

 Stat. 285. Near South coast of Timor. 34 M. Limit between mud and coral, Lithothamnion. 

 4 Spec. 



The specimen from Stat. 47 is rather small, only 12Y2 Mill. (Smith's type 22 Mill.) but 

 it agrees very well with the description, the gemmules are well developed; in the other specimens, 



