PARTULA, TAHITI. 199 



margined, or margined with a white line. Surface lustrous, 

 faintly marked with growth lines and minute, crowded, finely 

 rippled spiral striae throughout. Whorls 5, but slightly con- 

 vex, the last one compressed below the periphery, and strongly 

 convex, somewhat swollen, at the base. (This is well shown 

 in fig. 2). The aperture is nearly vertical, more than half 

 the total length. Peristome broadly reflexed, the basal and 

 outer margins thickened within except near the upper end 

 of the lip, which is thin and merely a little expanded. Colu- 

 mellar margin dilated and bifurcate above. Parietal callus, 

 a transparent film. 



Length 16, diam. 8, length aperture 9 mm. 



Length 17, diam. 8.6, length aperture 9.5 mm. 



Length 17.8, diam. 8.5, length aperture 9.9 mm. 



Society Islands: "Upper portions of all the central val- 

 leys on both the east and west sides of Raiatea. It is more 

 abundant in Toloa and Hapai valleys than elsewhere. Owing 

 to its peculiar habit of living on the foliage near the tops of 

 trees, it easily escapes observation. It occurs more rarely at 

 Tahiti, where it has, also, a wide range, and is confined to 

 the upper portions of the valleys." (Garrett) . 



Partula attenuata PEASE, Proc. Zool. Soc., 1864, p. 672;. 

 1871, p. 473. PFEIFFER, Mon. Hel., vi, p. 156. SCHMELTZ, 

 Cat. Mus. Godeff., v, p. 92. HARTMAN, Cat. Part., p. 11; 

 Obs. Gen. Part, Bull. Mus. Comp. Zool., ix, p. 179. GARRETT, 

 Journ. A. N. S. Phila. ix, 1884, p. 70. Partula gracilis 

 PEASE, Amer. Jour. Conch., ii, 1866, p. 197; 1867, p. 81, pi. 

 1, fig. 3. BINNEY, Proc. Acad. Nat. Sci. Phil., 1875, pp. 244, 

 247, pi. 19, fig. 6 (part of jaw). PEASE, Proc. Zool. Soc., 

 1871, p. 473. PFR., Monogr. viii, 198. Partula carteretensis 

 REEVE (not of Quoy and Gaimard), Conch. Icon., sp. 13, pi. 4, 

 fig. 13. SCHMELTZ, Cat. Mus. Godeff., iv, p. 72. 



This snail is closely related to P. annectens of Huaheine, 

 having in common with that the color, texture and sculpture, 

 and especially the peculiar shape of the last whorl, which is 

 compressed below the middle, then swollen around the umbili- 

 cal region in both species. It differs from annectens by its,, 



