PARTULA, RAIATEA AND TAHAA. 215 



placed parietal tooth. Peristome thickened, dilated, the* 

 margins joined by a callus, the right margin bearing 

 an oblong callus within, above the middle. Length 19, 

 diam. 11, aperture with peristome 11% mm. long, 4 wide in- 

 side. (Pfr.). 



Raiatea: restricted to the higher portion of Haamoa val- 

 ley, on the east of Raiatea, where it is not uncommon on 

 foliage. (Garrett). 



Partula callifera PFEIFPER, Proc. Zool. Soc., 1856, p. 333;. 

 Mon. HeL, iv, p. 511. CARPENTER, Proc. Zool. Soc., 1864, p. 

 675. PEASE, Proc. Zool. Soc., 1871, p. 473. HARTMAN, Cat. 

 Part., p. 8 ; Obs. Gen. Part., Bull. Mus. Comp. Zool., ix, p. 180. 

 GARRETT, Journ. A. N. S. Phila. ix, 1884, p. 60, pi. 3, f. 82, 

 Partula megastoma PEASE, MS., SCHMELTZ, Cat. Mus. 

 Grodeff., v, p. 92. Partula callistoma SCHMELTZ, 1. c., p. 207 ; 

 vi, p. 81. 



A beautiful and very distinct species, totally lacking cuticle 

 in adult shells, and hence having a dull surface and cream- 

 white color; the early whorls generally yellow, sometimes 

 white. The last whorl is quite inflated, the aperture rounded- 

 oval, usually three-toothed: there is a strong parietal tooth, 

 a wider one above the middle of the outer lip, and a smaller 

 denticle, or sometimes only an indistinct callous nodule, on 

 the columella. The lip is generally thickened on the face, 

 which is usually carinated. The size varies from length 17, 

 diam. 11 mm., to length 21, diam. 12% mm. Fig. 3 repre- 

 sents one of the specimens sent by Mr. Pease as megastoma. 



23. P. SOLIDULA Reeve. PI. 20, fig. 12. 



"Shell acuminately ovate, rather gibbous, compressly um- 

 bilicated, solid, whorls flatly convex, obliquely irregularly 

 striated, minutely sculptured with spiral impressed lines, 

 aperture auriculate, the lip and columella being broadly cal- 

 lously reflected ; straw-color, sometimes reddish at the apex. 



"A solid sub transparent shell, having the character and 

 substance of P. otaheitana with the form and coloring of 

 P. gibba; excepting that the whorls are not crowned with 



