118 PLACOSTYLUS DIPLOMORPHA. 



large, inflated. Aperture subvertical, pale within, becoming red or 

 orange within the lip, the parietal callus dull crimson within ; peri- 

 stome reflexed and recurved, ivory white, thickened within, especi- 

 ally at and below the middle of the outer lip, there being a projec- 

 tion or blunt tooth just above the middle, and a distinct though wide 

 sinus above. Columella obliquely truncated at base, straight above; 

 parietal wall covered with a heavy, white-edged callus. 



Alt. 20, diam. 14, length of aperture 12 mill (type). 



Alt. 24-J, diam. 17, length of aperture 16f mill. 



Alt. 16J, diam. 11J, length of aperture 11 mill. 



New Hebrides : Aura Island, in the Malo Pass, on the ground 

 (De la Tour). 



Partula (Diplomorpha) De la Touri HARTMAN, Proc. Acad. Nat. 



Sci. Phila. 1886, p. 35, pi. 2, f. 19 MABILLE, Soc. d'Hist. Nat. 



d'Autun, viii Bull., 1895, p. 411. 



Allied to P. peasei (Cox), from which it differs in the much less 

 obese last whorl and narrower umbilicus. In other respects the two 

 species are closely allied. P. delatouri varies remarkably in size. 

 Hartman's type (fig. 10) is intermediate between the largest and 

 smallest examples. 



P. COXIANA Pilsbry, n. n. PL 72, figs. 13, 14. 



Shell umbilicate, ovate, solid and strong, denuded of cuticle, white, 

 faintly flesh-tinted, becoming fleshy near the lip, the earlier three 

 whorls dull reddish, fading to an obscure yellow toward the suture 

 above. Surface somewhat glossy, irregularly wrinkle-striate, with- 

 out spiral striation ; the first 1^ whorls densely and minutely wave- 

 wrinkled. Spire rather short, the apex obtuse, whorls 4J, rather 

 convex, the last excavated behind the columellar lip, forming a 

 rather open umbilicus, which however scarcely penetrates beyond the 

 last whorl, and is grooved within. Aperture decidedly oblique, 

 ovate, white within, becoming orange toward the lip; peristome 

 broadly reflexed, white, its face convex, thickened within, the outer 

 lip regularly arcuate. Columella orange within and slightly con- 

 cave, making an angle with the basal margin; its edge very broadly 

 expanded and reflexed ; parietal callus rather heavy, white edged, 

 orange within. 



Alt. 27, diam. 16, longest axis of aperture 16.3 mill. 



New Hebrides: Aneiteum (Dr. J. C. Cox). 



