30 PLACOSTYLUS, NEW CALEDONIA. 



a. Shell not very thick, the aperture openly ovate, outer lip 

 hardly or not calloused, the columella without a strongly project- 

 ing fold, not calloused. Group of P. bavayi, p. 30 

 a 1 . Shell usually large, solid and often compressed ; lip and colu- 

 mella generally heavily calloused, but the aperture open and 

 usually large. Group of P.fibratus, p. 35 

 a 2 . Shell moderate sized, of compact, ovate contour ; the lip, colu- 

 mella or both bearing heavy callosities, more or less contract- 

 ing the rather small aperture. Group of P. porphyrostomus, p. 



Group of P. bavayi. 



These forms are the least specialized of the New Caledonian 

 species, retaining the generalized features of the species of the New 

 Hebrides ( P. fub'gineus, etc.) and the Solomons (P.founaki}. 



P. EDDYSTONENSIS (Pfeiffer). PI. 6, figs. 1, 2, 3. 



Shell 5m perforate, ovate-conic, rather thin, closely striate and sub- 

 obliquely malleated, deep chestnut ; spire exactly conic, the apex 

 acute, suture lightly impressed, somewhat crenate. Whorls 6, a 

 little convex, the last a little longer than the spire, rounded at base. 

 Columella thin, receding, subplicate, orange. Aperture a little 

 oblique, subangulate-oval, pearly and greenish-livid within ; peristome' 

 simple, slightly expanded, obtuse, dull orange- colored ; columellar 

 margin slightly dilated. Alt. 74, diam. 34, length of aperture 42 

 mill. (Pfr.). 



Hienguen (Montrouzier, Magen, Marie) ; Ouagap (Rossiter) ; 

 environs of Balade (Magen), and of Pouebo (Magen). 



Bulimus Eddystomnsis PFEIFFER, Proc. Zool. Soc. London, p. 88 

 (1855) ; Malak. Blatter, ii, p. 157, 1855 (Eurytus} ; Novit. Conch., 



i, p. 54, pi. 16. f. 1, 2 (1856) ; Monogr. iv, p. 363 ; vi, 8 GASSIES, 



J. de C., vi, p. 274, 1857 ; Faune Nouv. Gated, i, p. 49, 1863 ; ii, p. 



88, pi. 7, f. 3. CROSSE, J. de C., xii, p. 146, 1864 Bulimus hien- 



guenensis CROSSE, J. de C., vol. xix, p. 181, 1871; xviii, p. 218, pi. 



8, f. 3, 1875 Bulimus servaini EUTHYME, in Bull. Soc. Malac. 



France, ii, p. 244, 1885. Placostylus hienguenensis KOBELT, Conch. 

 Cab. Placoslylus, p. 113, pi. 27, f. 5, 6, 1891. CROSSE, J. de C., 

 1894, p. 288. 



"The shell and peristome are comparatively thin in this species; 

 the peristome, usually orange, tends sometimes to become reddish." 

 Pfeiffer originally described a specimen in the Cuming collection, 



