3i5 

 ii. Nassa (Alectryon) elegantula n. sp. PI. XIX, fig. 11. 



Stat. 2. Madura-strait. 56 M. Grey mud with some radiolariae. 2 Spec. 



Stat. 294. io°I2'.2S., 124 27'. 3 E. Timor Sea. 73 M. Soft mud with very fine sand. 1 Spec. 



Stat. ? 6 Spec. 



Shell elongately-ovate, with rather acuminate spire, very smooth and shining, cream- 

 coloured, with two more or less conspicuous reddish-brown bands, more distinct only on the 

 back of last whorl, one of them below the suture, the other at the periphery. Whorls about 9, 

 of which 3Y0 form a smooth nucleus, with a peripheral keel, the next whorls are costate, ribs 

 about as large as the interstices, they are crossed on the upper whorls by inconspicuous spiral 

 lirae, which disappear as well as the ribs with age, the ; th whorl is only ribbed without spirals, 

 on the penultimate whorl these ribs become also obsolete, till on the last whorl only a row of 

 laro-e beads remains, giving a coronated appearance to it ; these beads are also traceable on 

 the upper whorls; base of last whorl groovecl, moreover very fine growth-striae cross the 

 shell. The whorls are rather convex, separated by a conspicuous, slightly canaliculate suture-, 

 aperture elongate, canaliculate above, peristome with a narrow, slightly reflected margin and a 

 broad, flat rib behind it, with about 7 denticles on its basal part, internally with about 16 lirae, 

 of which that bordering the canal, is very strong, nearly toothlike ; columellar margin callous, 

 wrinkled in its whole length, with a stronger wrinkle above, ending below in an oblique, strong 

 fold. Canal rather deep, narrow. Interior of aperture faintly brown. 



Alt. 25, lat. 13; apert. alt. (with canal) 12, lat. 6 MUI, 



I cannot identify this species with any known one. It has some resemblance with N. 

 laevigata Marrat (On some proposed new forms of the genus Nassa; p. 2, PI. 1, fig. 7) but 

 is much more elongated and differs in the particulars of the aperture, that species having f. i. 

 a smooth peristome. It resembles fig. 1 1 of the same plate {N. plicosa Krauss, curious var.) in 

 colour but not in shape. N. hirta may also be allied, but is quite different in many particulars 

 of the aperture and sculpture. Unfortunately the precise locality of the best specimens is not 

 known; those from Stat. 2 are young, that from Stat. 274 is much smaller and perhaps by 

 some particularity of the bottom, more reddish-brown, but it quite agrees in shape and sculpture. 



12. Nassa (Alectryon) momlis Kiener. 



KlENER. Coq. Viv. Vol. VIII, Buccinum, p. 68, PI. u, fig. 40. 



REEVE. Conch. Ie. Vol. VIII, Nassa, fig. 38. 



TRYON. Man. of Conch. Vol. IV, p. 28, PI. 9, fig. 60. 



Stat. 277. Kulewatti-bay, Dammer-island. Reef. 2 Spec. 



13. Nassa (Alectryon) nodifcra Powis. 



PowiS. Proc. Zool. Soc. Lond. 1835, p. 95. 



REEVE. Conch. Ie. Vol. VIII, Nassa, fig. 23. 



TRYON. Man. of Conch. Vol. IV, p. 28, PI. 8, fig. 55 [lurta pars). 



Stat. 311. Sapeh-bay, East coast of Sumbawa. 3 Spec. 



Tryon thinks this form to be "if the figure of Reeve is correct, only a very broad, 



6 9 



