TORNATELLINA. 



Society Is.: Huaheine; and Austral Is.: Rurutu (Garrett). 

 Hervey Is.: Mauiki (C. D. Voy), Raratonga (Garrett). 

 'Pound abundantly on all of the islands in southeastern 

 P( >lynesia ' ' ( Garrett) . 



Tornatcllina nitida PEASE, Proc. Zool. Soc., 1860, p. 439; 

 Journ. de Conch., 1871, p. 93 ; Proc. Zool. Soc., 1871, p. 473 

 Pfeiffer, Mou. Hel., vi, p. 264. GARRETT, Journ. A. N. S. 

 Phila., ix, 1884, p. 83, pi. 2, L 24; Proc. Acad. Nat. Sci. Phila., 

 1879, pp. 22, 26 (Rurutu) ; Journ. Acad. Nat. Sci. Phila., 

 1881, p. 399 (Hervey Is.). 



This species is distinguished by the short but high and 

 acute lamella superposed upon the columellar fold, and only 

 visible in an oblique view in the aperture. It differs from T. 

 conica by the columellar lamella. Half-grown and young 

 shells down to 1.5 mm. long are like the adults except that the 

 columellar lamella emerges, and in those under 2 mm. long 

 we notice no palatal denticles. T. coliimellaris, which we kmuv 

 only from Mousson's description, seems to be a broader shell, 

 but otherwise it must be very closely related. T. perplexa 

 Garrett is closely related to nitida, but it has a triplicate colu- 

 mella. while in T. nitida there is no subcolumellar denticle. 



Within the aperture there are often compressed palatal 

 denticles, arranged in pairs, vertically. In some shells there 

 are several such pairs. In other individuals there may be 

 several denticles strung along in a single spiral series. PI. 

 36, figs. 3, 7, represent examples from Huaheine. In pi. 34, 

 fig. 11, a specimen from Mauiki, Hervey Is., is shown in back 

 view, showing the internal teeth through the shell, which 

 measures 2.7 x 1.4 mm. 



Pease's description of this shell is not very satisfactory. 

 He probably had some other species mixed with the nitida. 

 Garrett, in 1879, gave a new description of nitida, fixing the 

 name on the present species. His identification is in all prob- 

 ability correct, and may be accepted pending new collections 

 from Ebon Island, or an examination of Pease's type. The 

 original description follows: 



"Tornatcllina nitida. Shell small, ovately turreted, thin, 

 fragile, of a light horn-color, whorls six, rounded ; last whorl 



