802 



Distinguished by the broad band in the middle of the whorls, 

 and by the angular, produced aperture. 



Isle of Burias; seven fathoms, fine sand. (Mus. Cuming.) 



7. Niso candidula (clxx. f. 4, 5), A. Adams. 



N. testa subulato-pyramidali, albida, nitida, longitudinaliter 

 substriata ; anfractibus quatuordecim, convexiusculis, ultimo sub- 

 angulato ; apertura elliptica, antice producta, angustata ; labio sub- 

 retiexo; umbilico mediocri, perspectivo, margine corrugate 



A white, solid, pyramidal species, with the sides slightly con- 

 cave, the last whorl somewhat angulated, and with a rather nar- 

 row, corrugated umbilicus. 



Philippines. (Mus. Cuming.) 



8. Niso imbeicata (pi. clxx. f. 10), Sowerly (Eulima), Pro. 

 Zool. Soc. 1834; Conch. Illustr. f. 4. 



N. testa acuminato-pyramidali, albida, longitudinaliter spadiceo- 

 lineata; anfractibus infra angulatis, prominentibus ; umbilico 

 parvo ; apertura antice angulata. 



Acuminately pyramidal, whitish, longitudinally lineated with 

 light red ; whorls angulated below, prominent ; umbilicus small ; 

 aperture anteriorly angulated. 



Sancta Elena ; in sandy mud, from six to eight fathoms. (Mus. 

 Cuming.) 



Genus LEIOSTRACA, H. et A. Adams. 



Shell turreted, subulate, flattened, widest from side to side, 

 polished, smooth, semipellucid ; sides with a thin varix extending 

 as far as the apex of the spire; aperture oblong, entire; inner 

 lip distinct, callous, slightly sinuous in the middle; outer lip 

 flexuous. 



This genus comprises a suite of small polished shells resembling 

 Eulima, but they are always straight and laterally compressed ; 

 the whorls are usually adorned with a coloured band, the aper- 

 ture is elongate, and the sides of the whorls are furnished with 

 thin varices. 



1. Leiostraca Metcalfei (pi. clxx. f. 12, 13), A. Adams. 



L. testa aciculato-fusiformi, compressa, lateribus varicibus im- 

 pressis continuis instructis ; anfractibus planis, cingula rufa lineis- 



