TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
55 
imperforate, rimate or compressly umbilicated ; aperture subvertieal, oblong, obauri- 
forni, white, sides nearly parallel ; parietal wall with a more or less well-developed 
tubercular tooth ; peristome white, thick, moderately expanded, surface concave, 
heavily labiated within, strongly contracted above, forming a rather profound sinus, 
and generally subdentate next to the emargination ; columellar lip subuodose. 
Length 21, diam. 12 mill. 
^'ar. a. Uniform chestnut-brown. Rare. 
Var. h. Base and sutural band chestnut-brown. Somewhat rare. 
A ar. c. With a broad, median, chestnut-brown band. Rather rare. 
This species is restricted to Toloa and Hapai valleys on the west coast of Raiatea, 
where it is abundant on foliage. 
1 nke all the species, they differ some in size, shape, and some have the spire more 
abbreviated than others. The type which inhabits llapai valley is nearly always 
imperforated and may be distinguished from the imperforate formona by its smaller 
size, gibbous columella and parietal tooth. Carpenter confust'd it with dentifern, an 
allied species, confined to the opposite side of the island. 
P. Raiatensis = recta. Pse., MS., which inhabits Toloa, was by Carpenter referu'd 
to ((i/rictilain, a species of a different type. Dr. Hartman unites it to dehtifera. After 
a careful study of about 2000 .specimens of the two species, I have annexed the Toloa 
with the Hapai .shell. The only difference between the two is that Raiatensis is usually 
lighter-colored, seldom imperforated, and the apex is much more frecpiently rose-red. 
Tt is, I think, more nearly related to the dentated inhabiting the neighboring 
island, than to dentifera. 
The latter species is much more frequently edentate on the parietal wall, the lip 
thicker, more angadated on the surface, and the labial tooth much larger and more 
acute. It is never banded, and the ajiex is not rose-red, but is frequently tinged with 
lemon-yellow. 
P. COMPACT.^, Pease. 
Partula comijacta, Pease, Amer. .Jour. Conch,, 1866, p. 200; 1867, p. 81, PI. 1, lig. 9 ; 
Proc. Zool. Soc., 1871, p. 473. Paetel, Cat. Conch., p. 104. Sehmeltz, Cat. Hus. Godefl'., 
V, p. 92. Pfeiffer, Mon. Hel., viii, p. 207. (Nenia) Hartman, Cat. Part., p. 7 ; Ohs. Gen 
Part., Bui. Mus. Com. Zool., ix, pp. 181, 192. 
Partula auriculata, var.. Carpenter, Proc. Zool. Soc., 1864, p. 675. 
Partula callifera, Gloyne (not of Pfeiffer), Qtiar. Jour. Conch., i, p. .338. 
The metropolis of this common, solid, arboreal species is in Hamoa valley, on the 
east coast of Raiatea, the home of P. callifera. It is confined to the lower half of 
the valley and has not spread any to the southward, hut to the north it is found in 
limited numbers in two small valleys. 
Its ])rincipal features are its ovate-conic form, conshxnt parietal tooth, subauriculate 
aperture, xvhicli is much contracted by a thick deposit of callus in the inner margin 
