Terrestrial Mollusca from Norfolk Island. 537 



Tornatellina norfolkensis moohuensis, subsp. n. 



Shell differing from T. norfolkensis, Preston, in its very 

 slightly shorter and much broader form, and in the parietal 

 lamella, which, in the present species, is quite obsolete. 



Alt. 3'5, diam. maj. 1*5 mm. 



Hab. Moohu Stone, a small islet off the coast of Norfolk 

 Island (R.Bell). 



Tornatellina norfolkensis nepeanensis, subsp. n. 



Shell allied to both T. norfolkensis and T. moohuensis, but 

 differing from the former in its much broader form and from 

 the latter in its more tapering spire, more rounded whorls, 

 and well-developed parietal lamella. 



Alt. 3' 5, diam. maj. 1*5 mm. 



Hab. Nepean Island (E. Bell). 



With the exception of Vallonia sp., which is exceedingly 

 plentiful, this and the following are the only living species 

 of land-mollusca found upon the island. 



Tornatellina duplicilamellata, sp. n. 



Shell fusiformly ovate, polished, shining, yellowish 

 brown ; whorls 5, regularly but rather rapidly increasing, 

 somewhat inflated, marked only with growth-stria? ; suture 

 impressed : columella margin white, twisted, bearing a short 

 projecting lamella above, descending below in an almost vertical 

 curve ; aperture rather obliquely inversely auriform, fur- 

 nished with a well-developed, entering, parietal lamella. 



Alt. 2'25, diam. maj. 1*5 (nearly) mm. 



Hab. Nepean Island (R. Bell). 



Palaina norfolkensis, sp. n. 



Shell moderately small, sinistral, fusiformly ovate ; colour 

 of type-specimen pale yellowish, but varying in individuals 

 from pure white to yellowish and delicate flesh-colour ; 

 whorls 6, convex, the first two small, the third large in 

 proportion, the remainder regularly increasing, the apical 

 whorl quite smooth, the second showing signs of very oblique, 

 obsolete, transverse ribbing, the third finely and rather 

 closely costulate; the fourth and remainder beautifully sculp- 

 tured with slightly distant and oblique, erect, transverse, 

 blade-like costulee, the interstices on all four last whorls 

 sculptured with fine, closely set, wavy, spiral striae ; suture 

 deeply impressed ; umbilicus very narrow ; labium con- 



Ann. & Mag. N. Hist. Ser. 8. Vol. xii. 36 



