1887.] MOLLUSKS OF THE VITI ISLANDS. 303 



1866, p. 446, pi. 38. fig. II ; Mousson, Journ. de Conch. 1870, 

 p. 186; Brazier, Journ.de Conch. 1870, p. 84; Schmeltz, Cat. 

 Mus. Godeff. v. p. 102 ; Pfeiffer, Mon. Pueum. iv. p. 85. 



Diplommatina paradoxa, Crosse, Journ. de Conch. 18.57, p 449. 



JDipIommatlna australicB, Schmeltz (not of Benson), Cat. Mus. 

 Godeff. iii. p. 30; Paetel, Cat. Conch, p. 118. 



Diplommatina macrostoma, " MSS.," Schmeltz, Cat. Mus. Godeff. 

 iv. p. 75 ; Paetel, Cat. Conch, p. 118. 



Diplommatina distorta, " MSS.," Schmeltz, I. c. p. 75 ; Paetel, 

 /. c. p. 118. 



This species inhabits Viti Levu and Ovalau. 



It may be distinguished by its sinistral, distorted, ovate-conical 

 form, cinereous or luteous horn-colour, 5| swollen whorls, the last one 

 smaller than the preceding and ascending. The sculpture consists 

 of fine, crowded, oblique, lamelliform strise, wliich become larger 

 and more remote on the body- whorl. Aperture large, sub vertical, 

 and nearly circular. The peristome is continuous, expanded, and 

 Iq adults the parietal wall is subplicate. Jjength 3 raillim. 



2. Diplommatina pomati^formis, Mousson. 

 Diplommatina (Diancta) pomaticeformis, Mousson, Journ. de 



Conch. 1870, p. 180, pi. 8. fig. 2; Pfeiffer, Mon. Pneum. iv. p. 81. 



Discovered by Dr. Graffe in the central portion of Viti Levu. 



A sinistral, inflated, costate-striated, cinereous species, with 6| 

 rounded whorls, the last one smaller than the penultimate, scarcely 

 ascending, and the striae coarser and more distant than on the pre- 

 ceding whorls. The vertical aperture is circular, pale luteous, and 

 the peristome is slightly reflected and duplicated. Length 5 millim. 



3. Diplommatina subregularis, Mousson. 

 Diplommatina (Diancta) subi-egularis, Mousson, Journ. de Conch. 



1870, p. 181, pi. 8. fig. 3 ; Pfeiffer, Mon. Pneum. iv. p. 81. 



This species inhabits " Nagara," on the south coast of Viti Levu, 

 where it was found by Dr. Graffe. 



A sinistral, yellowish horn-coloured species, shaped like the pre- 

 ceding, but not so much inflated and with the spire more regular. 

 The sculpture consists of distant acute striae. Whorls 7, convex, 

 the penultimate somewhat inflated, the last one small and ascending. 

 The vertical aperture is quadrately circular, and the slightly expanded 

 peristome is subduplicated. Length 3 millim. 



4. Diplommatina ascendens, Mousson. 



Diplommatina (Diancta) ascendens, Mousson, Journ. de Conch. 

 1870, p. 184, pi. 8. fig. 5 ; Pfeiffer, Mon. Pneum. iv. p. 82. 



Dr. Graffe discovered this species on the island of Viti Levu. 



It is a sinistral species about 31 millim. long, of a flesh-white 

 colour, acutely ovate form, with distant lamelliform riblets and 

 rather deep suture. Whorls 5|, convex, rapidly increasing, the 

 last one smaller than the penultimate and ascending. The rather 

 large aperture is somewhat quadrate in shape and the peristome is 



21* 



