2. .\ . n. sp. PI. XVII, fig. - . 



St.tt. 51. Madura-bay. 69 91 M. Fine rej and, coralsand with shclls and 1 Spec, 



Bougainville Strait. 141 M. Fine and coai ie sand with dead 



-.llclls. 1 S] 



Shell pyramidal, solid, smooth, porcellaneous, white, umbilicated. Whorls i.j, slowly 



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



hery, 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 



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



width of the umbilicus. Practically 1 sec no sculpture, but a few growth-striae, which are for 



the majority very faint and rarely have the charact< r 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. 5'-; apert. alt. (obl.) 3, lat. 2; entrance of umbilicus 2 Mill. 



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

 and that species has a rounded last whorl, it resembles in shape .Y. 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 gracilis Pease. 



l'i \-i . American Journ. of Conch. Vol. III, p. 295, PI. 24, fig. 27. 

 TRYON. Man. of Conch. Vol. VIII, p. 284, PI. 70, fig. 4. 



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

 1909, p. 2. 



Stat. [31. Beo, Karakelang-islands. 13 M. 1 Spec. on Echinothrix diadema L. 



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

 which i^ a copy "f the original one. but it is smaller, being only about 3 instead oi | Mill.. 

 the number of whorls 1 about 7; agrees with that of the description, but an adult specimen in 

 my collection, has a larger number of whorls. 



2. Mucronalia philippinarum Sowerby. 



iWERBY. Proc. Mal. Soc. Lond. Vol. I\', p. 127, PI. 11, fig. 5. 

 S» 111 ï'MAN. in Schepman & Xierstrasz. Parasit. Prosobranch. d. Siboga-Expedition. Leiden, 



■ 3- 

 Stat. 220. Pasir Pandjan I coast of Binongka. Reef. 1 Spec. on Heterocentrotus iiuwiil- 



latus Lin. 



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



6 



