42 
(oa) 
; MR. F. CHAPMAN ON SOME 
Previously known localities for this species are Port Jackson, 
Australia, Booby Island, and New Caledonia. Typical valves were 
found at Funafuti in the lagoon dredgings off Rocky Islet (Sollas 
coll.) ; and in the samples from the lagoon, No. 1, $ mile from the 
Mission Church, 10 fathoms (David coll.). 
LoxoconcHA TUMIDA, sp. nov. (PI. 37. figs. 5 a-c.) 
Carapace seen from the side subovate, rounded, highest behind 
the middle; height equal to two-thirds the length; anterior 
extremity broad and well rounded; posterior end obliquely 
rounded on the dorsal angle and produced into a beak-like 
process; dorsal margin boldly arched, ventral slightly sinuous. 
Edge view subrectangular, sloping steeply towards the anterior 
margin, but somewhat square posteriorly. End view almost 
circular. Shell-surface smooth. Length °5 mm. 
In some respects this form resembles L. honoluliensis*, but is 
more tumid, and the surface is not relieved by pittings. 
From the beach-sand, Avalau Islet, Funafuti (Sollas coll.). 
XESTOLEBERIS, G. O. Sars. 
XESTOLEBERIS GRANULOSA, G. S. Brady. 
Xestoleberis granulosa, G. 8S. Brady, 1880, Rep. Chall. Exped., Zool. 
pt. ui. p. 125, pl. xxx. figs. 5 a-d. 
This species, which is also known from New Caledonia among 
other localities, occurs with some frequency at Funafuti. It is 
essentially a shallow-water form, and was found in the beach- 
sand of Fualopa Islet and the lagoon dredgings, Rocky Islet 
(Sollas coll.). Also from the soundings across the lagoon, 
sample 17, 84 miles from the Mission Church, 12 fathoms, and 
sample 18, 9 miles from the Mission Church, 73 fathoms (David 
coll.). 
XESTOLEBERIS SETIGERA, G. S. Brady. 
Xestoleberis setigera, G. 8. Brady, 1880, Rep. Chall. Exped., Zool. 
pt. iii. p. 125, pl. xxxi. figs. 2 a-d and figs. 3 a-c. 
This form, which closely resembles X. depressa, G. O. Sars, is 
not common at Funafuti, although well distributed. It occurs 
in the beach-sand of Avalau, the sand from the lagoon beach at 
* G.S. Brady, 1880, Rep. Chall. Exped., Zool. pt. ili. p. 117, pl. xxviii. 
figs. 6 a—f. 
