TORNATELLINA. 175 



species resembles T. serrata. Mousson's description is given 

 above and his figure copied, pi. 34, fig. 5. Garrett writes as 

 follows: "Not uncommon, and ranges from the Paumotu to 

 the Viti Isles. I forwarded Mr. Pease a number of examples 

 of this species intermixed with oblong a, 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 pari- 

 etal lamina is larger, and the columella more tortuous." 



We have figured also an example from Huaheine, collected 

 by Garrett (pi. 34, fig. 6). It measures, length 3, diani. 1.55, 

 aperture 1 mm., whorls 5^. 



Two species of Tornatellina, T. oblonga Pse. and T. im- 

 pressa iwrmalis (T. conica Mouss.), were .collected by the 

 junior author on Palmyra Island in July, 1913. Both were 

 very common on the fronds of the birdnest fern (Asplenium 

 nidus}, leaves of Pandanus, the trunks of trees and fallen 

 leaves of the coconut palm. Undoubtedly 'both species were 

 introduced at the time when coconuts were brought in large 

 numbers for planting. 



Palmyra specimens of impressa normalis have a slightly 

 stronger parietal lamella and the apical whorls are not as 

 tightly coiled as specimens from the Society Islands, collected 

 and identified by Garrett. 



The systematic plaice of T. impressa is uncertain. It may 

 be a Lamellina ; but as yet series of the young have not been 

 examined. 



Var. intuscostata P. & C. PL 34, fig. 7. 



The shell is conic, with straight general outlines, corneous- 

 brown, marked with opaque whitish longitudinal streaks, of 

 which there are 2 or 3 on the last whorl, usually one on the 

 penultimate whorl; these streaks being caused by internal 

 white ribs. Whorls 5*4, rather strongly convex, the last one 

 inflated. Aperture quite oblique, ovate. Parietal lamella 

 small, deeply entering. Columella somewhat calloused, 



