APPENDIX —MOLLUSCA. 551 
SCAPHOPODA. 
CADULUS ARATUS, sp. nov. 
(Fig. 60.) 
Shell short and stout, slightly swollen and gently 
tapering to either end, on one side almost straight, 
on the other arcuate, glossy and almost transparent. 
In one case the translucent ground is mottled with 
opaque white spots. Four longitudinal equally spaced 
furrows impress the surface. Anal end bilabiate, the 
lips usually widely parted, that on the straighter side 
projecting beyond its fellow. In one case the lips 
are of equal length almost touching distally and 
divided by a narrow slit. Aperture very oblique 
with a small thickened rim. Length 3:4; breadth 
‘64 mm. Another specimen, length 2; breadth -48 mm. 
Dredged 36 fathoms north of Pava Islet; 36 
fathoms N. 30° W. of Pava Islet; 50-60 fathoms 
off Tutaga Islet and 150 fathoms off Beacon Islet 
(Funamanu). 
The Fijian C. dichelus, Watson, a near relative, is twice as large, 
more bent and unfurrowed. 
GASTEROPODA. 
SCISSURELLA EQUATORIA, sp. nov. 
(Fig. 61.) 
Shell large for the genus, thin, trochi- 
form, with gradate spire ; frilled, pro- 
jecting keels; compressed belt below 
the fasciole, and tumid base. Colour 
white. Whorls five. Sculpture—about 
eighty five, curved, oblique, lamellate 
ribs cross the whole shell Above, the 
spiral sculpture can hardly be traced, 
but on the base it is distinguishable as 
delicate, widely spaced threads over- 
riding the ribs and latticing the inter- 
spaces. Fasciole enfolded by broad 
margins, which are fimbriated by the 
ribs. Umbilicus narrow, infundibuli- © 
form, deep. Aperture oblique, sub- ~ 
quadrate; lip slightly and _ gently 
recurved ; columella margin explanate 
and reaching over the umbilicus. Major 
diameter 3, minor 2°5; height 2°68 m.m. 
One specimen dredged off Tutaga 
Islet in 200 fathoms. 
