558 FUNAFUTI ATOLL. 
in 1898, when in charge of the Diamond Drill Boring 
Expedition. 
RIssOA POOLEI, sp. nov. 
(Fig. 73.) 
Shell broadly ovate. Whorls four. 
Colour white with a few subsutural orange 
dots, one of which occurs on the lip and 
three on the remainder of the last whorl. 
Sculpture—the last whorl is angled at a 
weak spiral rib on the periphery. Pro- 
portionately stronger are three on the 
penultimate, and two on the antipenulti- 
mate, similar spiral ribs. ° The whole shell 
is closely covered by minute, close, wavy, 
spiral threads which are overridden by 
faint, close, longitudinal sculpture extend- 
ing across the whole whorl. Umbilicus 
small, covered by the columella. Aperture 
round, rather oblique. Lip massive, expanded and _ broadly 
reflected with a second lip or varix close behind. Columella 
broad appressed. Length -95; breadth ‘66 mm. 
Dredged off Tutaga Islet at depths of 45 — 52, 50 — 60, and 200 
fathoms ; off Beacon Islet (Funamanu) at 150 fathoms ; and north 
of Pava Islet at 36 fathoms. 
The affinities of this shell are with the species previously 
described from Funafuti as Aissoa invisibilis. It is named in 
honour of Mr. William Poole, B.A., a volunteer’ assistant of the 
second expedition to Funafuti. 
DIALA PROFUNDA, sp. nov. 
(Fig. 74.) 
Shell subulate, thin. Colour, the figured example 
has the first four whorls ochraceous, the next two 
almost white, the last two ochraceous buff with the 
columella and lip tawny ; another specimen is uni- 
form dark brown. Whorls eight. The apex smooth 
and blunt ; the third and fourth whorls with two 
raised spiral cords each, the remaining whorls 
angled above and below the suture. Surface 
smooth and shining. Aperture perpendicular, 
angled above, rounded below; outer lip straight 
and sharp; columella reflected over a minute per- 
foration. Length 1°9; breadth -66 mm. 
Dredged off Tutaga Islet at depths of 45 — 50, 
Fig. 74. 50 — 60 and 200 fathoms ; and in 36 fathoms north 
and 36 fathoms N. 30° W. of Pava Islet. 
