56 NILS HJ. ODHNER, MOLLUSCA. 
FAM. PURPURIDAE. 
Ricinula (Sistrum) ochrostoma Briainvititye. 45 miles W. S. W., 70 feet (*/s), 
I sp., h. 15.46 mm. With yellow dots in the crossing points of the longitudinal and 
the revolving costae; aperture white within. — Distribution: Persian coast of Indian 
Ocean (MetvitL & STanpdeN 1901), Mauritius (v. Martens 1880), Queensland (HED- 
LEY 1910), the Philippines, Paumotus Isles (TRyoN 1880). 
FAM. OLIVIDAE. 
Ancillaria monilifera Rerve. 45 miles W. S. W., 48 feet (°/:), 1 sp., h. 12.5 
mm. Agrees in all essentials with REEVE’s fig. 36 (Conch. Icon. 15, 1864) but be- 
tween the series of points is simply white, not reticulated. Rrvn’s specimen comes 
from Swan River. Tryon classes the species with A. marginata LAMARCK, which is, 
however, doubtful when we consider the difference in size. 
Oliva duclosi Rerve. 45 miles W. S. W., 70—72 feet ('/s), 1 sp., 1. 13.5 mm. 
It agrees best with Rerxrve’s fig. 45a of C. lentiginosa, which Tryon (Man. of Conch., 
Vol. V, 1883) declares to be identical with the present species. It has elongated 
brown spots beneath the suture (5 on the whorl), 1 median and 1 suprafascicular band 
of spots (TRyon Pl. 32, fig. 17 is very similar). — Distribution: China to Australia, 
Polynesia and New Zealand (Tryon). 
20. sidelia Ductos (Pl. 2, fig. 58). 42 miles W. S. W., 36 feet (?"/7), 1 sp., 
1. lls mm; 45 miles W. 8S. W., 70—72 feet (''/c), 4 sps, max. 1. 1l.s mm. The 
present specimens closely resemble O. faba MAryatr (SowrErBy, Thes. Conch. 4, pl. 
343, figs. 238, 239). TryoN considers this species as identical with O. sidelia. As 
the determination of the present specimens, in view of the great confusion of Oli- 
vidae, is somewhat uncertain, I give a figure of the form here referred to O. sidelia. 
In colour it is light grayish blue with thin regular yellowish repeatedly angulated 
stripes and distant grayish brown twice-bent streaks and some large grayish brown 
spots beneath the suture (6 on the last whorl); interior white. The fine yellowish 
fulguration also recalls the more distinet colouring of O. rufofulgurata ScureMan 
(1911; Siboga Exp.). — Distribution: China to Viti Isl., and Madagascar (TRYON 
1883). 
FAM, MARGINELLIDAE. 
Marginella (Volvaria) philippinarum Ruprinup. 45 miles W. S. W., 70 feet 
(*/7), 1 shell, 1. 14 mm. The shape is like that of fig. 84 in Rerve (Conch. 
Ieon. 15, 1866), and the colour shows three very indistinct bands; the columella 
bears 4 plaits. — Philippines (Tryon 1883), W. Australia (HEDLEY 1916). 
M. (Volvaria) mustelina Ancas. 45 miles W. 8S. W., 66 feet ('°/:), 1 sp., 1. 6 
mm. It agrees with the description and the figure in Rrrve (Conch. Icon. 15, 1866, 
pag. 48, pl. 12, fig. 87), as well as with the shape of fig. 82, pl. XXVI, in TatTE & 
May 1901 (Proe. Linn. Soe. N. 8. Wales), the mouth is, however, somewhat more 
