TORNATELLINA. 161 



(Cooke) ; Oahu: Manoa (Baldwin, Cooke), Tantalus, Nuu- 

 aiiu and Makiki (Cooke) ; Maui: Kapuulena and Kaupakalua 

 (Baldwin) ; Hawaii: Waipo (Thaanum, Henshaw). 



Tornatellina oUonga Pse., ANCEY, Mem. Soc. Zool. France, 

 v, 1892, p. 72; Journ. de Conchyl., li, 1903, p. 301. HEN- 

 SHAW, Joum. de Malac., xi, 1904, pp. 64, 70. 



Hawaiian examples differ only in size from specimens col- 

 lected by Garrett at the Society Islands. 



Length 4.2, diam. 1.4 mm. Society Islands. 



Length 3.9, diam. 1.4 mm. Kauai (pi. 42, figs. 8, 9). 



The Hawaiian examples are found under the same condi- 

 tions as mentioned by Garrett (Journ. Acad. Nat. Sci. Phila., 

 ix, 1884, p. 81). 



In an embryonic specimen (fig. 7), from Nuuanu, Oahu, 

 the shell is imperforate, globose, with very minute raised 

 spiral lines on the upper l 1 /^ whorls. The parietal lamella is 

 rather strong, a little more than a half of a whorl in length. 

 The columella is vertical, with minute twisted folds. 



At the beginning of the metaiieanic substage (pi. 41, figs. 

 6, 9; pi. 42, fig. 10), an example, 1.8 mm. in length with 4 

 whorls, fig. 10, has the following characteristics : the parietal 

 lamella is nearly straight, not lobed, and the margin is very 

 slightly sinuous ; the columella is vertical, sigmoicl, with a 

 very weak upper fold, the median fold is rather deeply situ- 

 ated, oblique and not very strong and there is a minute lower 

 tubercle ; there are two palatal ribs, both of which can be seen 

 through the aperture, their margins are slightly undulate, but 

 not distinctly serrate or toothed as in other species of this 

 section. 



Adult shells of T. peponum and Hawaiian examples of T. 

 oblonga do not differ as much as do the young. In adult spe- 

 cimens of T. peponum the whorls are more convex and loosely 

 coiled, the outer margin of the aperture is more convex (in 

 T. oblonga it is somewhat flattened), the columella is more 

 strongly twisted and the parietal lamella is stronger and not 

 as straight. The young at the metaneanic and until the para- 

 neanic stage are easily separated by the much stronger median 

 columellar fold, the strongly lobed parietal lamella, and the 

 strongly toothed palatal ribs of T. peponum. 



