238 



2. Niso Smithi n. sp. PL XVII, fig. 7. 



Stat. 51. Madura-bay. 69 — 91 M. Fine grey sand, coralsand with shells and stones, i Spec. 

 Stat. 153. o°3'.SN., 130° 24.3 E. Bougainville Strait. 141 M. Fine and coarse sand with dead 

 shells. I Spec. 



Shell pyramidal, solid, smooth, porcellaneous, white, umbilicated. Whorls 14, slowly 

 increasing, slightly convex, separated by a conspicuous suture; last whorl angulated at the 

 periphery, by a slightly cordlike keel: base convex, with a strong keel bordering the umbilicus, 

 this latter is pervious, funnel-shaped, with a rather strong keel interiorly along its wall; this 

 keel is crenulated by rounded crenules, about 10 in last whorl, considerably diminishing the 

 width of the umbilicus. Practically I see no sculpture, but a few growth-striae, which are for 

 the majority very faint and rarely have the character of very indistinct varices. 



Aperture elongately subrhombic, protracted below, with an acute angle above, a thin, 

 regularly arched outer margin, scarcely angulated by the peripheral keel ; base strongly angular 

 by the terminating of the keel bordering the umbilicus, columellar margin curved, concave, a 

 little reflected, scarcely angulated by the umbilical keel. 



Alt. 12, lat. s'*/^; apert. alt. (obi.) 3, lat. 2; entrance of umbihcus 2 Mill. 



This new species has a superficial resemblance with N. candidula, but is much smaller 

 and that species has a rounded last whorl, it resembles in shape N. goniostoma^ but that species 

 is still larger, more elongated and quite different in colour. I have named it in honour of 

 Mr. Edgar A. Smith, the well-known keeper of the mollusca in the British Museum. 



Mucronalia A. Adams. 



1. Mucronalia gj'acilis Pease. 



Pease. American Journ. of Conch. Vol. Ill, p. 295, PI. 24, fig. 27. 

 Tryon. Man. of Conch. Vol. VIII, p. 284, PL 70, fig. 4. 



ScHEPMAN, in Schepman & Nierstrasz. Parasit. Prosobranch. d. Siboga-Expedition, Leiden, 

 1909, p. 2. 



Stat. 131. Beo, Karakelang-islands. 13 M. i Spec, on Echinotlirix diadema L. 



The only specimen seems to be still young, it agrees very well Avith the figure of Tryon, 

 which is a copy of the original one, but it is smaller, being only about 3 instead of 4 Mill., 

 the number of whorls (about 7) agrees with that of the description, but an adult specimen in 

 my collection, has a larger number of whorls. 



2. MiLcronalia philippinarum Sowerby. 



SowERBY. Proc. Mai. Soc. Lond. Vol. IV, p. 127, PL 11, fig. 5. 



Schepman, in Schepman & Nierstrasz. Parasit. Prosobranch. d. Siboga-Expedition. Leiden, 

 1909, p. 3. 



Stat. 220. Pasir Pandjang, west coast of Binongka. Reef, i Spec, on Heterocentrotus mamil- 

 latiis Lin. 



The specimen agrees as well with Sowerby's description and figure, as with a specimen 



6 



