PLACOSTYLUS, NEW CALEDONIA. 51 



P. GUESTIERI (Gassies). PL 10, fig. 27 ; pi. 24, figs. 9, 11 ; pi. 25, 



figs. 15, 16. 



Shell imperforate, ovate-conic, compressed from front to back^ 

 solid ; white under a yellowish-chestnut cuticle, streaked with darker 

 reddish or blackish chestnut. Surface sculptured with longitudinal 

 growth-wrinkles (much too prominent in the figures) and lightly 

 malleated spirally. Whorls 6J-7, but slightly convex, the last one 

 oval, ascending in front. 



Aperture ovate, deep orange within or pale and ochreous in the 

 throat; peristome yellowish- white or fleshy-white, broad, though 

 hardly reflexed, thick, and blunt or keeled ; the outer lip with a 

 shallow sinus above ; columella whitish, having a strong callous fold ; 

 parietal callus whitish, with a small or moderate whitish tubercle. 



Length 86, cliam. 40 mill. (type). 



Length 97, diarn. 53, aperture 63 mill. 



Ouvea, Loyalty Is. (Lambert); Mont-Dor (Marie). 



Bulimus guestieri GASSIES, J. de C., 1869, p. 72 ; Faune Conch. 

 N.-C., ii, pp. 74, 192, pi. 3, f. 11 ; iii, p. 46. PFR., Monogr. viii, p. 

 20. Placostylus guestieri KOBELT, t. c., p. 69, pi. 17, f. 1 CROSSE, 

 Journ. de Conchy!., 1894, p. 26G Bulimus souvillei var. gatopensis 

 CROSSE, J. de .C., 1870, p. 242 and 414 Plac.' guestieri v. gato- 

 pensis CROSSE, J. de C., 1894, p. 267, pi. 10, f. 2. Bulimus cica- 

 tricosus GASSIES, Faune, ii, pi. 4, f. 2 (but not the descriptive text). 

 Placostylus cicatricosus KOBELT, t. c., p. 90, pi. 22, f. 3, with var. 

 oriental-is, f. 1, 2. CROSSE, J. de C., 1894, p. 269. ? Placostylus 

 (bavayi var.?) rhinoclieti KOBELT, t. c., p. 75, pi. 18, f. 1 (1891). 



A smaller species than P. souvillei^ with thicker peristome, and 

 pallid columella and parietal callus. It is closely allied to P. boul- 

 ariensis, goroensis and buccalis, and its union with the latter two may 

 become necessary. Fig. 11 of pi. 24 is a copy of the original figure, 

 which however represents a small form rather than the usual develop- 

 ment of the species, which ordinarily attains a length of 90 to 100 

 mill. The var. alba is merely a white-lipped specimen ; var. major 

 being larger, length 110 mill. It is from Mont Dor. Which of the 

 two localities given supplied the type is not known. 



Var. gatopensis Crosse. (PI. 24, fig. 10.) " A shell of medium 

 size, with the spire denuded and roseate, the latter two whorls (and 

 particularly the last) covered with a very peculiar greenish-olive 

 epidermis, upon which some brownish and inconspicuous transverse 



