slightly convex, separated by a conspicuous suture, which is slightly marginated. Sculpture consisting 

 of impressed spiral striae, more conspicuous below, especially on the canal. Aperture oblong- 

 ovate, peristome rather blunt, with a shallow sinus above, with a broad, flat varix externally 

 and 5 or 6 short folds internally, columellar side with a conspicuous layer of enamel and 4 

 pustules on the lower half; canal rather wide and deep. 



Alt. ii, lat. 5; apert. alt. 5, lat. 2 Mill. 



Mr. Melvill who had the kindness to look at this species, says that except in colour 

 it is alike in form to C. austrina Gask. That species has been desenbed as smooth, with a 

 broad flesh-coloured band; even in the worn specimens the spiral striae are easily to be seen 

 and none of the specimens has traces of an uninterrupted band, so I must consider it to be 

 distinct. The sinus or notch of the peristome is of the same character as in C. marquesa Gask. 



12. Coliunbella (Mitrella) elongata n. sp. PI. XX, fig. 7. 



Stat. 162. Between Loslos and Broken-islands, West coast of Salawatti. 18 M. Coarse and fine 

 sand with clay and shells. 1 Spec. 



Shell subulate with long, acute spire, whitish, with a yellowish epidermis. W'horls 9, of 

 which scarcely 2 form a convex nucleus; subsequent whorls flat, with a linear suture, last whorl 

 subangular at the periphery, contracted below and so forming a short canal, slightly directed 

 to the left. Sculpture consisting of undulated growth-striae and a few (about 1 3) spiral grooves 

 at the base. Aperture elongate, angular above, peristome thin, simple, with a large sinus above, 

 columellar margin smooth, with a thin layer of enamel. Canal rather narrow, deep. 



Alt. io 1 /,, lat. 37 3 ; apert. alt. 4, lat. i 1 ^ Mill. 



This species is of a very simple character and has much puzzled me ; indeed I was in 

 doubt if it ought not to be placed amongst the P 'leurotomidae, on account of the large sinus 

 and thin peristome; unfortunately the soft parts are wanting or at least not visible in the 

 aperture, and as there was but one specimen, I could not destroy it. If the canal were straight, 

 it could be located in the Section At il ia. 



13. Coliunbella (Mitrella) simplex n. sp. PI. XX, fig. 8. 



Stat. 45. 7°24'S., ii8°IS'.2E. Flores Sea. 794 M. Fine grey mud. 2 Spec. 

 Stat. 88. o°34'.6N., H9°8'.sE. Makassar-strait. 1301 M. Fine grey mud. 2 Spec. 

 Stat. 178. 2°4o'S., 128 37'. 5 E. Ceram Sea. 835 M. Blue mud. 1 Spec. 



Shell oblong-ovate with high but rather blunt spire, transparent, corneous, with irregular, 

 opaque, white lines or fiames, which scarcely bear the character of colour markings. Whorls 7, 

 of which about 2 form a nearly bulbous nucleus. Subsequent whorls slightly convex, separated 

 by a conspicuous but shallow suture, which, by the transparency of the shell seems to be 

 maro-inated, last whorl rounded, slightly contracted below. Sculpture consisting of crowded, in- 

 distinct ribs on about 2 upper postnuclear whorls, remaining ones smooth, except for very fine 

 growth-striae and occasionally a few spiral striae near the base (only conspicuous in one specimen, 

 scarcely visible in another, both trom Stat. 45, entirely wanting in the specimen from Stat. 88). 



37 



