116 PLACOSTYLUS DIPLOMORPHA. 



deep orange-scarlet, paler in the throat and on the face of the lip ; 

 peristome expanded or subreflexed, its face moderately or very much 

 thickened; thickened within, but somewhat excavated and sinuous 

 near the upper insertion ; columellar margin reflexed, partially clos- 

 ing the umbilicus, thickened within, forming a more or less distinct 

 angle with the basal margin ; bearing a very strong, tooth-like callous 

 fold a*)ove. Parietal callus rather heavy, bearing a high, compressed 

 tooth in or near the middle, situated well inward. 



Alt. 22, diam. 13.7, longest axis of aperture 1.5 mill. 



Alt. 18. 2, diam. 12.7, longest axis of aperture 12.7 mill. 



New Hebrides : Vate Island. 



Partula layardi Brazier, ANCEY, II Naturalista Siciliano iii, p. 

 344 (Sept. 1, 1884), no description. HARTMAN, Proc. Acad. Nat. 

 Sci. Phila., 1886, p. 35, pi. 2, f. 18 (no description). 



This species has not hitherto been described, as Ancey gave only 

 a diagnosis of his group Diplomorpha, and Hartman gave a figure. 

 The latter however may be held to define the species. I cannot find 

 that Mr. Brazier ever described the species, and Hartman, who 

 gave me his MSS. bibliographic catalogue of Partula and Diplo- 

 morpha, revised within a year or two of his death, leaves a blank in 

 place of a reference to Brazier. 



Some apparently fresh specimens are quite white throughout (fig. 

 5), while others are richly colored. None in a considerable series 

 before me seems to have any trace of the cuticle, though it may pos- 

 sibly be present on some dark specimens (figs. 1, 2). 



The typical form plate 72, figs. 1, 2, has the lip only moderately 

 thickened, and the exterior of a dull brown color. Other specimens 

 have the lip greatly thickened and white or brilliant orange, and the 

 exterior is either orange, purplish or white. 



P. BRAZIERI (Hartman). PI. 72, fig. 6. 



Shell umbilicate, ovate, moderately solid, the specimens yet known 

 without cuticle, whitish-yellow, becoming bright yellow arid then red- 

 orange behind the lip, the spire orange. Surface rather coarsely 

 wrinkle-striate. Whorls 3|, convex, the last inflated, very slowly 

 and slightly ascending in front. Aperture ovate, vertical, yellowish 

 within ; peristome red-orange tJiroughout, the outer lip very slightly 

 expanded, becoming expanded below, the columellar margin reflexed. 

 Columella concave below, straightened above, not truncate ; parietal 



