TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. ol 
stragglers taken on the opposite coast. The same side of the stream is also the home 
of the sinistral P. Mooreana. 
Several miles to the eastward of Vaianai, in a large valley named Oahumi, it is 
found equally as abundant as in the former location. ‘The Oahumi shells, which are 
slightly modified (— strigosa = alternata), gradually inosculate with lineata. It 
occurs, also, sparingly in a valley more to the eastward, where it is associated with P. 
temiata and striolata. 
The type is luteous, or straw-yellow, rather shining, and girdled by two or three 
narrow, equidistant reddish chestnut bands. The shell is comparatively thin, com- 
pressly perforated, more or less wrinkled by incremental striv, and the fine spiral 
incised lines are generally obsolete on the last whorl. ‘The produced spire is a trifle 
more than half the length of the shell. ‘The rather small aperture is truncately oval, 
and the parietal tooth is seldom absent. ‘The white peristome is rather thin, mod- 
erately expanded, slightly reflected, lightly labiated within, and rarely with a slight 
sinus above. The columellar lip is receding above at its junction with the parictal 
wall. 
Length 19, diam. 10 mill., which are about the average dimensions. 
The following color-varieties occur :— 
Var. a. Uniform chestnut-brown, sometimes approaching blackish brown, with a 
pale sutural line. Rare. 
Var. 6. Dark chestnut-brown, with a wide, median, luteous band on the body-whorl. 
Rare. 
Var. c. Luteous or straw-yellow, with a very broad, deep, chestnut band on the 
middle of the body-whorl. Rare. 
Var. d. Luteous, with faint, longitudinal, light fulvous-brown  strigations. 
Common. 
The sinistral examples, of which I obtained about fifty, exhibit the same variation 
as the dextral shells. 
Contrary to the opinion of Messrs. Pease and Hartman, I follow Reeve, Pfeiffer 
and Carpenter in referring this species to Lesson’s /ineata, which that author erro- 
neously accredited to Oualan or Strong’s Island, one of the Caroline: group. Lesson 
either collected his specimens at Moorea, or he received them from some of the foreign 
residents at Tahiti, and, as was too frequently the case with the naturalists of the 
exploring expeditions, had forgotten the correct habitat. 
The following is a translation of Lesson’s brief description :— 
“Shell perforated, oblong-oval, luteous, with two fulvous bands; spire conical ; 
whorls six, slightly convex, last one as long as the spire; aperture oval; peristome 
expanded ; columellar margin much thickened within. Length 8, diam. 5 lines. 
Hab.—Oualan Island.” 
