426 FUNAFUTI ATOLL. 
CarEcuUM EXILE, De Folin. 
De Folin, Joc. czt., p. 687, pl. ili,, figs, 20 — 22. 
Four specimens of this were collected with the preceding. That 
two are a pale umber colour suggests that the unique shell dredged 
by the “ Challenger” off Tongatabu and described as crystalline, 
was faded. I have also taken this at Panie, New Caledonia. 
CAECUM GULOSUM, sp. nov. 
(Fig. 16). 
Shell white, slender, rather curved, suddenly 
expanded behind the aperture, concentrically sculp- 
tured by fine close threads which grow coarser 
anteriorly. Septum much exserted, flattened distally 
and with two rough ring ridges. Length 1-8, breadth 
‘4 mm. 
One specimen from the lagoon beach. 
Nearest to C. attenwatum which is narrower and 
more curved, also allied to C. amputatum, Hedley,* 
from which it differs by being smaller and of a more 
slender build. 
VERMETUS MAXIMUS, Sowerby. 
(Fig. 17). 
Tryon, Man. Conch. viii., 1886, p. 184, pl. lv., figs. 89, 90; 
Morch, Proc. Zool. Soc. 1861, p. 166. 
The Funafuti people consider this species good food, and call it 
“gea.” It occurs in abundance in large clumps of Millepora 
growing on the lagoon side of the southern horn of the main islet. 
Here the earlier and irregularly coiled whorls were imbedded in 
the coral mass, but the last half foot of the tube stood up erect 
and free. What I consider the same species also grew, though 
rarely, on the outer reef-flat at low water, where it was altogether 
prostrate and had a more pronounced keel. 
One fine specimen is thirty-five mm. across the aperture. Within 
the shell is white, smooth and porcellanous, at the slightly everted 
lip it has a faint purple tinge which soon fades. Externally it 
has a longitudinal, dorsal keel or crest, and is concentrically 
furrowed by growth lines. The distal part of the tube is, perhaps 
as a repair after injury, sometimes plugged with a shelly wad. 
The animal is bold and active, if touched it shrinks two or three 
inches down the tube, but soon recovers confidence and rises to 
the aperture. The mantle margin is sometimes entire, sometimes 
notched dorsally. The long thick retractor or columella muscle 
is ventral. , 
* Hedley—Proc. Linn. Soc. N.S.W., (2) viii., 18938, p. 504, fig. 
