TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
105 
Hah. — Raiatea and Borabora. 
On the ground in forests. Raiatea examples are larger and more depressed than 
Borabora specimens. It is very closely allied to minuta, but may be distinguished by 
its more effuse aperture, more expanded lip and larger size. 
H. FABA, Pease, MS. Plate III, figs. 61, 61 a, 61 b. 
Helicina faba, “ Pease,” Carpenter, Proc. Zool. Soc., 1864, p. 676. Pease, Amer. Jour. 
Conch., 1867, p. 226. (Name only.) 
Helicina albolabris, Carpenter (not of Philippi), 1. c. 
Shell depressly conoid, rather thin, slightly shining, smooth, faintly striated ; 
reddish brown, corneous, pale straw-yellow, rarely bifasciate ; spire depressly conoid or 
convex, apex subacute ; whorls four, subplanulate or slightly convex, rapidly increasing, 
last one not deflected in front, depressed above, with a more or less prominent com- 
pressed keel on the periphery ; suture linearly impressed ; base convex ; aperture very 
oblique, subovate ; peristome slightly expanded, thickened within, slightly emarginate 
above, a little produced at the carination and angulated at its junction with the short 
receding columella ; callus rather thin, spreading, concolored or whitish. Operculum 
corneous or amber-color. 
- Major diam. 6, less. 5, height mill. 
Ilab . — Raiatea and Moorea. 
The above is the size of my largest Raiatea specimens. They are not very 
plentiful, and are found adhering to the trunks of trees. The Moorea shells are 
more rare and more globose in shape as well as smaller than the Raiatea examples. 
The banded variety occurs at Moorea. 
As compared with albolabris, it is smaller, thinner, more shining, and the shape of 
the peristome is quite different in the two species. In size, texture and color it is 
more nearly related to corrugata, but may be distinguished from that species by its 
more turbinate form and the absence of the basal groove. 
H. simulaXs, Garrett. Plate III, figs. 66, 66 a, 66 b. 
Shell depressed, lenticular, rather thin, faintly striated, pale brownish horn-color, 
or light straw-yellow; spire depressly conoid; suture linearly impressed; whorls four, 
very slightly convex, last one depressed, not deflected in front, carinated on the per- 
iphery, keel rib-like, obtuse ; base convex ; aperture very oblique, rather large, semi- 
eUiptic’al ; peristome expanded, thin, very slightly receding above, angulate at the 
junction with the short receding columella ; basal callus thin, concolored. 
Major diara. 6, height 3 mill, 
jjab. — Tahiti. On bushes. 
Shaped like corrvgata, but wants the basal groove of that species. 
