398 THE TERRESTRIAL MOLLUSCA INHABITING 



It can readily be distinguished by its swollen body, rounded whorls, prominent 

 thin parietal lamina, and somewhat twisted columella, which in young examples is 

 biplicate. 



T. OBLONGA, Pease. 



Tornatellina oblonga, Pease, Proc. Zool. Soc, 1864, p. 673; Jour, de Conch., 1871, p. 93; Proc. 



Zool. Soc, 1871, p. 473. Pfeiffer, Mon. Hel., vi. p. 264; viii. p. 317; Schmeltz, Cat. Mus. 



Godeff., V, p. 89. Garr., Proc. Phil. Acad. Nat. Sci., 1879, p. 21. 

 Tornatellina bacillaris, Mousson, Jour, de Conch., 1871, p. 16, Pi. 3, fig. 5. Pfeiffer, Mon. Hel., 



viii. p. 316. Schmeltz, Cat. Mus. Godeff., v. pp. 89, 90. 



This species is widely diffused over all the groups in Southeastern Polynesia, 

 and ranges west as far as the Samoa and Tonga Islands. Like all the species of 

 this type it lives on the ground, generally concealed beneath dead wood and 

 decaying leaves, ranging from the low-lands near the sea-shore to two thousand or 

 more feet above sea-level. 



Mr. Pease's type specimens were collected by me at the- Society Isles. Prof. 

 Mousson gives a most excellent description of this species under the name of 

 hacillaris, collected by Dr. Graffe, in the Samoa Group. 



Its slender form and nearly vertical, simple columella will easily distinguish it. 



T. PEEPLEXA, Garrett. 



Tornatellina perplexa., Garr., Proc. Phil. Acad. Nat. Sci., 1879, p. 24. 



Tornatellina bilamellata, Schmeltz (not of Anton), Cat. Mus. Godeff., v. p. 90. 



So far as known this species is confined to the Cook's, Austral, and Society 

 Islands, where it is not uncommon in the low-land forests. 



Though shaped like T. nitida, it may be determined by its more flattened and 



bidentate columella, larger, and more oblique parietal lamina. Anton's bilamellata, 



. "which inhabits " Opara" = Rapa, is twice the size of our shell, and, according to 



the description, has a smaller plait on the wall of the aperture, and is destitute of 



the palatel dentacles. 



T. SIMPLEX, Pease. 



Tornatellina simplex, Fease, Proc. Zool. Soc, 1864, p. 673; 1871, p. 473. Pfeiffer, Mon. Hel., 

 vi. p. 266; viii. p. S19. Garr., Proc Phil. Acad. Nat. Sci., 1819, p. 22. 



Plentiful in all parts of the group, and is also diffused throughout the Austral, 

 Society, and Marquesas Islands. ' 



Mr. Pease's type specimens were collected by me at Tahaa, one of the Society 

 Islands. He either overlooked or inadvertently omitted to mention the small but 

 constant parietal lamina in his brief diagnosis. He mentions only five whorls, and 

 states that the last one equals half the length of the shell. There are six whorls 



