82 TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
I forwarded Mr. Pease a number of examples of this species intermixed with 
oblonga, and, supposing the two to be identical, he included it in his diagnosis of the 
latter species. Having collected hundreds of specimens of both species at the different 
groups, I do not hesitate to consider them quite distinct. As compared to oblonga, it 
is lighter-colored, more robust, spire more rapidly tapering, body-whorl larger and 
more or less compressed in the middle. The parietal lamina is larger, and the 
columella more tortuous, 
Mousson’s var. impressa is not uncommon in eastern Polynesia. 
T. SIMPLEX, Pease. Plate II, fig. 21. 
Tornatellina simplex, Pease, Proc. Zool. Soc., 1864, p. 673; 1871, p.473. Pfeiffer, Mon. Hel., 
vi, p. 266. Garrett, Proc. Acad. Nat. Sci. Phila., 1879, p. 22; Jour. Acad. Nat. Sci. Phila., 
1881, p. 398. 
Tornatellina Newcombi, var., Schmeltz, Cat. Mus. Godeff., vi, p. 80. 
This species is distributed throughout all the groups of islands in southeastern 
Polynesia; on the ground, in forests. 
Mr. Pease’s type specimens were collected by me at Tahaa. He either overlooked 
or inadvertently omitted to mention the small, but constant, parietal lamina in his 
brief diagnosis. The open umbilicus, small parietal lamina, smooth and simple colu- 
mella, will distinguish it from any other south Polynesian species. 
Though shaped like 7. Newcombi, which inhabits the Sandwich Islands, it is 
smaller, the umbilicus larger, the columella simple, no¢ biplicate, and the parietal 
lamina is smaller than in Pfeiffer’s species. 
T. PERPLEXA, Garrett. Plate II, fig. 23. 
Tornatellina perplexa, Garrett, Proc. Acad. Nat. Sci. Phila., 1879, p. 24; Jour. Acad. 
Nat. Sci. Phila., 1881, p. 398. 
Tornatellina bilamellata, Schmeltz (not of Anton), Cat. Mus. Godeff., v, p. 90. 
Not uncommon, and ranges throughout the group. Also common to the Austral 
and Cook’s Islands, 
As compared with nitida, the nearest allied species, it has a more dilated and 
bidentate columella. The upper denticle is larger and not so acute as in nitida, 
Some examples have the palatal denticles mounted on longitudinal lines of callus. 
T. SERRATA, Pease. Plate II, figs. 22, 22 a. 
Lamellina serrata, Pease, Proc. Zool. Soc., 1860, p. 489; 1871, p. 473. 
Tornatellina serrata, Pfeiffer, Mon. Hel., vi, p. 265. 
Lamellina levis, Pease, Proc. Zool. Soc., 1864, p. 672; 1871, p. 473. 
Tornatellina levis, Pfeiffer, Mon. Hel., vi, p. 216. 
Not uncommon, and distributed throughout southeastern Polynesia. 
For further remarks, see my two papers on the land shells of Rurutu and Cook’s 
Islands, published by the Academy of Natural Sciences of Philadelphia. 
— 
