TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
51 
stragglers taken on the opposite coast. The same side of the stream is also tlie home 
of the sinistral ]\ Mooreava. 
Several miles to the eastward of Vaianai, in a large valley named Oahnmi, it is 
found equally as abundant as in the former location. The Oahnmi shells, which are 
slightly modified (= strigosa — alfernata), gradually inosculate with Uneata. It 
occurs, also, sparingly in a ^'alley more to the eastward, where it is associated with P. 
tceniuta 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 Avrinkled by incremental striic, and the tine spiral 
incised lines are generally obsolete on the last whorl. The produced spire is a trifle 
more than hall' 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. I'he columellar lip is receding above at its junction with the parietal 
wall. 
Length 19, diam. 10 mill., which are about the average dimensions. 
The folloAving color-varieties occur ; — 
Var. a. Uniform chestnut-brown, sometimes approaching blackish brown, with a 
pale sutural line. Rare. 
Var. h. Dark chestnut-brown, with a wide, median, luteous band on the body-whorl. 
Rare. 
Var. c. laiteous or straw -yellow, Avith a very broad, deep, chestnut band oh the 
middle of the body-Avhorl. Rare. 
Var. ( 1 . Imteous, Avith faint, longitudinal, light fulvous-broAvn strigations. 
Common. 
The sinistral examples, of Avhich I obtained about fifty, exhibit the same A ariation 
as the dextral shells. 
Contrary to the opinion of Messrs. Pease and Hartman, I folloAV Reeve, Pfeiffer 
and Carpenter in referring this species to Lesson’s lineata, AAliich that author erro- 
neously accredited to Oualan or Strong’s Island, one of the Caroline group. Les,son 
either collected his specimens at Moorea, or he received them from some of the foi'cign 
residents at Tahiti, and, as was too frequently the case Avith the naturalists of the 
exploring expeditions, had forgotten the correct habitat. 
The folloAving is a translation of Lesson’s brief descriptioir : 
“ Shell perforated, oblong-oval, luteous, with two fulvous bands ; spire conical ; 
Avhorls six, slightly convex, last one as long as the spire ; aperture oval ; peristome 
expanded ; columellar margin much thickened AAithin. Length 8, diam. 5 lines. 
Hah . — Oualan Island.” 
