} 
TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 61 
P. UMBILICATA, Pease. 
Partula umbilizata, Pease, Amer. Jour. Conch., 1866, p. 200; 1867, p. 81, Pl. I, fig. 7; 
Proc. Zool. Soe., 1871, p. 474. Paetel, Cat. Conch., p.104. Binney, Proc. Acad. Nat. 
Sci. Phil., 1875, pp. 245, 247, Pl. XIX, fig. 7 (anatomy). Schmeltz, Cat. Mus. Godeff., 
iv, p. 71. Pfeiffer, Mon. Hel., viii, p. 207. (Clytia) Hartman, Cat. Part., p. 8 (with 
woodeut) ; Obs. Gen. Part., Bul. Mus. Com. Zool., ix, p. 188. 
Partula auriculata, var., Carpenter, Proc. Zool. Soc., 1864, p. 675. 
The metropolis of this well-defined species is in a large valley, called Haamene, 
on the east coast of 'Tahaa, where they are found in prodigious numbers on the foliage 
of low bushes. It has not spread any to the southward, but, on the other hand, ranges 
in considerable numbers through all the valleys, except Faa-apa, the home of bilineata, 
as far as Murifanna on the northwest coast, where it is found associated with P. 
virginea. 
Its globose-conic form, large umbilicus, constant parietal tooth, rather narrow, 
slanting lip, subnodose columella and yellowish or brownish horn-color will readily 
distinguish it. 
Var. a. Uniform chestnut-brown. Common 
Var. 6. With one or two chestnut-brown bands. Rare. 
P. virernes, Pease, MS. Plate ITI, fig. 54. 
Partula wirginea, Pease, MS. Coll. Pease, 1863. Binney, Proc. Acad. Nat. Sci. Phil., 
1875, pp. 245, 247, Pl. XIX, fig. 8 (anatomy). Schmeltz, Cat. Mus. Godeff., vi, p. 81. 
(Astrea) Hartman, Cat. Part., p. 8; Obs. Gen. Part., Bul. Mus. Com. Zool., ix, p. 189. 
Partula solidula, var., Carpenter, Proc. Zool. Soc., 1864, p. 675. Pease, Proc. Zool. Soc., 
1871, p. 473. 
The specific centre of this species is in Vaipiti valley, on the west coast of Tahaa, 
where it occurs in the greatest profusion on the foliage of shrubs. It has extended 
its range to the northward as far as Murifanna on the north coast, which latter is the 
limit of the western range of P. wmbilicata. 
It may be described as follows :— 
Shell compressly umbilicated, solid, oblong-conic, somewhat shining, yellowish 
corneous or light fulvous brown; spire convexly conical, half the length of the shell ; 
suture margined by a whitish line; whorls 5-55, slightly convex ; aperture subvertical, 
oblong, obauriform, rounded below and much contracted by the strongly labiated 
peristome; parictal wall with a white tubercular tooth which is rarely absent; peris- 
tome white, sometimes tinged with carnation, widely expanded, subplanulate, slightly 
contracted above, and the margins frequently nearly united by a ridge of callus; 
columellar lip vertical, more or less distinctly nodose. 
Length 18, diam. 9 mill. 
Var. a. Uniform chestnut-brown. Not uncommon. 
Var. 6. Yellowish corneous, with a basal and sutural chestnut-brown band. Very 
rare. 
4) JOUR. A. N. S. PHILA., VOL. IX. 
