58 NILS HJ. ODHNER, MOLLUSCA. 
wholly smooth. Aperture about */s of the height of the shell, with a broad and 
short recurved cana], a deep subsutural sinus and an obsolete sinus near the canal. 
Columella straight, with thin reflected margin and a small callus at the lip insertion 
on the body whorl. Outer lip rather thin, simple. Colour light violaceous, with a 
yellowish tint, the interstices of the ribs somewhat darker; apex bluish white. — 
Distribution: the Philippines (TRyoNn 1884), Indian Archipelago (ScurPMAN 1913), 
Queensland (Hrpiey 1910). 
D. hololeuca n. sp. (Pl. 2, fig. 61). Shell pyramidally claviform with rather 
convex whorls, separated by rather deep sutures bounded with a somewhat nodulous 
subsutural carina, and a furrow below it. Aperture somewhat shorter than */3 of 
the shell height, with a broad and short recurved canal and a deep and narrow 
subsutural sinus, as well as a slight flexure in the lip margin above the canal. Colu- 
mella straight, with reflected margin and some irregular rugae in the middle part; a 
thick callus spreading over the body wall at the lip insertion. Outer lip simple, 
somewhat slightly crenelated in its edge. Sculpture consisting of oblique and some- 
what flexuous costae reaching the base of the canal and about 17 in number on the 
last whorl, 13 on the penultimate one, crossed by elevated revolving lines to the 
number of about 24 on the body whorl, alternating with finer ones below its middle; 
in the subsutural furrow 1 or 2 spiral threads. The 8 apical whorls wholly smooth. 
Colour milky white all over. Locality: 45 miles W. 8. W., 72 feet (°/:‘, 1 sp., h. 
17.2, br. 6.1; aperture height 7.4 mm, whorls 10. 
The shell somewhat recalls Pleurotoma torresiana EK. A. Smiru (1884, Moll. of 
Alert Exped.) but has a thicker canal and oblique, uniformly sized, longitudinal folds, 
as well as a snowy colour. 
Mangilia (Cythara) vittata Hinps. (Pl. 2, fig. 62). 45 miles W. S. W., 72 
feet (°/:), 1 sp., bh. 8, br. 4.2, aperture height 4 mm. The specimen agrees in shape 
with fig. 65 in Renve (Conch. Icon. 8, 1846). The determination is, however, uncer- 
tain, as no useful characteristics are established by the authors on the various species 
belonging to this genus. I therefore give a photograph of the shell. It is entirely 
white, only the posterior part of the body whorl shows 3 very faint yellowish bands, 
the upper one in the subsutural furrow. The whorls are angled in the middle by 
the convexity of the ribs. The number of longitudinal ribs in the last whorl is 12. They 
are crossed by very feeble elevated lines. Over the whole shell there exists a very 
fine, microscopical texture of granula, caused by the crossing of the spiral lines by 
fine longitudinal striae. Through the existence of this granulation, the suture becomes 
very feebly denticulated. — Distribution: Straits of Macassar (Tryon 1884). 
M. (Glyphostoma) spurca Hinps. 45 miles W. S. W., 72 feet (%/7), 1 shell, 
h. 9.0 mm. It has the characteristic form and sculpture as well as the three revolv- 
ing brown bands on the last whorls, which Rerve mentions (Conch. Icon. 1, sp. 
312). There are 11 longitudinal ribs on the last whorl, the last one varicose, and 5 
