
TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. oe, 
This small species, which is somewhat rare, was taken in a single valley on the 
north side of Tahiti, at an elevation of about 1500 feet above sea-level. A few 
examples were found ina small area in a lowland forest on the north coast of Moorea. 
It is shaped almost exactly like Binney’s figure of Bythinella Nicklineana, All the 
specimens, ten in number, now before me, have the peristome slightly doubled or 
duplicated. As compared with abbreviata, it is smaller, more slender, the aperture 
smaller, the whorls more rounded and basal perforation larger. 
A. OBESA, Garrett. Plate III, fig. 72. 
Shell small, perforated, solid, ovate-globose, decorticated, smooth, dull whitish horn- 
color, with a whitish or yellowish aperture; spire abbreviately conical, with an obtuse 
apex ; suture profound ; whorls five, convex, last one large, rounded ; aperture vertical, 
orbicular-ovate, nearly half the length of the shell; peristome continuous, simple, 
straight, regularly curved, base slightly expanded. 
Height 4, diam. 3 mill. 
Hab.—TVahiti, rare, in a single valley on the northwest part of the island. 
As compared with Vescoi, the nearest allied species, it is more abbreviate, the body 
more turgid and the spire shorter. 
Genus SCALINELLA, Pease. 
S. Tanirensis, Pease. 
Cyclostoma Tahitensis, Pease, Proc. Zool. Soc., 1861, p. 243. 
Hydrocena? Tahitensis, Pfeiffer, Mon. Pneum., iii, p. 173. 
Scalinella Tahitensis, Pease, Jour. de Conch., 1869, p. 58, Pl. VII, fig. 1; Proc. Zool. Soe., 
1871, p. 475. Mart. and Lang., Don. Bism., p. 59, Pl. IV, fig. 3. Schmeltz, Cat. Mus. 
Godeff., v, p. 102. 
Realia Tahitensis, Pfeiffer, Mon. Pneum., iv, p. 216. 
Not uncommon, and widely diffused over Huaheine, where it occurs on the ground 
in forests. So far it has not been detected on any other island in the group. It 
appears strange that Mr. Pease should have named this species Tuhitensis, when he 
was well aware that his type specimens were collected by me at Huaheine and not 
“Tahiti.” His description being very brief, I add the following :— 
Shell rimate, elongate-conical, moderately thick, pale cinereous or whitish horn- 
color beneath a brownish epidermis, which is rarely present; aperture concolored or 
various shades of ochraceous with a whitish peristome ; spire elongate, convexly conic, 
apex obtuse; whorls 6-7, rounded, the first two or three smooth, the following ones 
with small longitudinal compressed ribs, about twenty on the body-whorl, which latter 
is rounded at the base; aperture slightly oblique, subcircular, nearly one-third the 
length of the shell; peristome continuous, slightly expanded and usually adhering to 
the penultimate whorl. 
Length 6, diam. 25 mill. 
Generally decorticated and more or less eroded. 
