PARTULA, TAHITI. 197 



lique, sfebtriangular-semioval ; peristome a little expanded, 

 provided with a thick prominent callus within. Length 16, 

 diam. 8^/2, aperture with peristome 81/2 mm. long, 6^/2 wide 

 (Pfr.). 



Tahiti: "Restricted to the lower portion of Pirse valley, 

 on the northwest coast of Tahiti, where it is abundant on 

 foliage." (Garrett). 



Partula filosa PPEIFFER, Proc. Zool. Soc., 1851, p. 262 ; Mon. 

 Hel., iii, p. 450; Conchyl. Cab. ed. 2d, Bui., p. 267, pi. 64, 

 figs. 3, 4. HARTMAN, Cat. Part., p. 10; Obs. Gen. Partula, 

 Bull. Mus. C. Zool., ix, pp. 182, 183, 196. GARRETT, Journ. 

 A. N. S. Phila. ix, 1884, p. 64, pi. 3, f. 81. MAYER, Mem. 

 Mus. Comp. Zool. xxvi, no. 2, p. 126, figs. 9, 10. Partula 

 lineolata PEASE, Amer. Jour. Conch., 1867, p. 224; Proc. Zool. 

 Soc., 1871, p. 473. SCHMELTZ, Cat. Mus. Godeff., v, p. 92.- 

 PFEIFFER, Mon. Hel., viii, p. 206. 



P. filosa is quite distinct from other Tahitian snails, but is 

 very closely related to the Moorean P. nucleola Pse. It is 

 a small, ovate, solid and compactly coiled shell, dull or with 

 but little gloss, and either reddish-brown with darker pur- 

 plish summit, or dull yellow with the summit roseate; in 

 either case 'being irregularly marked with many backwardly 

 sloping longitudinal whitish lines. Under the lens these lines 

 appear ragged, and are seen to be due to the loss of cuticle 

 along some of the lines of growth. All the post-embryonic 

 whorls have this peculiarity. The spiral striation is well 

 developed throughout. All of the thirty examples seen have 

 a parietal tooth, but in some it is quite small. The peristome 

 is white, moderately expanded but strongly thickened within. 

 There is often the low indication of a tubercle on the colu- 

 mella. No banded or sinistral examples have been found. 



16. P. CLARA Pease. PI. 24, figs. 7, 8, 9. 



The shell is openly perforate, oblong-ovate, thin, sometimes 

 imperfectly translucent, pale yellowish corneous or very pale 

 chestnut, often variegated with darker obliquely axial streaks ; 

 suture with an opaque-white margin. Surface somewhat shin- 



