72 TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
sometimes brown-black, and frequently strigated. Yellowish horn-colored examples 
with the base and the sutural band chestnut, are not uncommon. The lip, though 
usually white, is frequently margined with purple-brown. 
Length 20, diam. 11 mill. 
The above is about the average dimensions. My largest example is 24 by 134 
and the smallest adult 17 by 10 mill. Sometimes, though rarely, the spire equals half 
the length of the shell. Very old examples have a more or less nodulous columella 
and a more or less distinct denticle on the outer lip. 
P. TznNraTA, Mirch. 
Bulimus (Partulus) teniatus, Mirch, Cat. Conch. Kjerulf., p. 29. 
Bulimus Otaheitanus, var., Pfeiffer, Mon. Hel., ii, p. 72, part. 
Partula teniata, Pfeiffer, Mon. Hel., iii, p. 451. Carpenter, Proc. Zool. Soc., 1864, p. 675. 
Hartman, Obs. Gen. Part. Bul., Mus. Com. Zool., ix, p. 188 (part). 
Partula striolata, Pease, Amer. Jour. Conch., 1866, p. 197; 1867, p. 81, Pl. I, fig. 4; Proe. 
Zool. Soc., 1871, p. 473. Pfeiffer, Mon. Hel., viii, p. 203. 
Partula simulans, Pease, Amer. Jour. Conch., 1866, p. 202; 1867, p. 81, Pl. I, fig. 11. Paetel, 
Cat. Conch., p. 104. Schmeltz, Cat. Mus. Godeff., v, p. 92. Pfeiffer, Mon. Hel., viii, 
p. 206. 
Partula nucleola, Pease, MS. Coll. Pease, 1863. 
Partula decussatula, Carpenter (not of Pfeiffer), Proc. Zool. Soc., 1864, p. 675. 
Partula spadicea, Hartman (Reeve ?), Cat. Part., p. 11. 
The metropolis of this truly protean species is in a very large semicircular valley 
on the north coast of Moorea, where it occurs in prodigious numbers on the foliage 
of bushes. In the western part of the same valley, where it exhibits less variation, 
it gradually intergrades with the form which has been distributed under the name 
of nucleola, Pease, which has its headquarters in a small, but isolated, valley about two 
miles west of Opunohu. 
Pease’s nucleola, which is quite abundant, is usually smaller, more solid, spire 
shorter, aperture smaller and more rounded, and the columella is more distorted, than 
in the typical teniata. But in looking over a large number of specimens we notice 
some examples which cannot be separated from some of the smaller forms of the 
latter species. 
On the southwest part of the island we find fe@niata tolerably abundant in three 
valleys, and, like the shells in the western part of Opunohu, it is subject to much less 
variation than obtains in the eastern part of the same valley. The shells from the 
southwest coast were described by Pease under the name of P. simulans. 
In the third or more eastern valley, where they come in contact with P. elongata 
and lineata, hybrids between the former and teniata are so numerous that any one 
collecting in that valley only would, without hesitation, pronounce them one and the 
same species. 
From this point to a distance of several miles, the valleys are inhabited by lineata, 
