1887.] MOLLUSKS OF THE VITI ISLANDS. 181 



Otostomus {Placostylus) elobatus, Semper, Phil. LaudmoU. iii. 

 p. 157, pi. 15. fig. 5. 



BuUmus cohbrinns, Pfeiffer, Proc. Zool. Soc. 1860, p. 138, 

 pi. 51. fig. 4 ; Malak. Blatt. 1861, p. 13 ; Mon. Hel, vi. p. 29 ; 

 Crosse, Journ. de Couch. 1864, p. 139. 



This species is restricted to the island of Vaniia Levu, where it 

 occurs beneath decaying vegetation. Examples inhabiting the 

 interior of the island are larger and much finer than those found in 

 the forests near the sea-shore. 



My largest specimens taken in the former location are (yQ millim. 

 long, and my smallest (adults) from near the sea-shore are only 46 in 

 length. The shape varies from oblong-ovate to elongate-ovate. It is 

 solid, white or ruddy beneath a fulvous epidermis, and ornamented 

 with longitudinal dark green waved or zigzagged stripes, which are 

 more or less interrupted. The apical whorls are usually reddish. 

 The aperture and lips are usually orange-red, and the throat fre- 

 quently whitish. The last two whorls are minutely corrugated. 

 A rare variety occurs with the lips and aperture wholly white. 



4. Placostylus morostjs. 



Bulhnus morosus, Gould, Proc. Bost. Soc. Nat. Hist. 1846, p. 190 ; 

 Expl. Exp., Shells, p. 72, fig. 82 ; Pfeiffer, Mon. Hel. ii. p. 56 ; 

 (CAam) id. Vers, p. 152 ; {Charis) Albers, Die Hel. 2nd ed. p. 196 ; 

 (Charis) Paetel, Cat. Conch. 1873, p. 98 ; Garrett, Amer. Journ. 

 Conch. 1872, p. 232 ; (Placostylus) Crosse, Journ. de Conch. 1875, 

 p. 20, pi. 8. fig. 1; Kobelt, Jahrb. malak. Ges. 1875, p. 225, 

 pi'. 7. figs. 7-8. 



Placostylus {Charts) morosus, Mousson, Journ. de Conch. 1870, 

 p. 125; Schmeltz, Cat. Mus. Godeff. v. p. 93. 



BuUmus elobatus, var. minor, Crosse, Journ. de Conch. 1864, 

 p. 140. 



This very distinct arboreal species has a wider range than any 

 other species inhabiting the group. It is distributed throughout 

 all parts of Vanua Levu, where I collected numerous examples. I 

 found it also on Rambi, Koro, Taviuni, Gomea, Lanthala, and Prof. 

 Mousson, on the authority of Dr. Graffe, records it from Viti Levu. 



It is a rather thin, oblong-ovate, uniform white, decorticated shell, 

 with a large aperture and widely reflected peristome. The rough 

 surface is not so conspicuously raalleated as P. malleatus. There 

 exists a rare abbreviated variety on the west end of Vanua Levu, 

 which exhibits a few olivaceous markings similar to those on the 

 latter species. 



5. Placostylus seemanni. 



BuUmus seemanni, Dohrn, Proc. Zool. Soc. 1861, p. 207, pi. 26. 

 fig. 6 ; Crosse, Journ. de Conch. 1864, p. 123 ; Pfeiffer, Mon. Hel. vi. 

 p. 13; Novit. Conch, iii. p. 474, pi. 102. fig. 18; Garrett, Amer. 

 Journ. Conch. 1872, p. 232; (Fumecostylus) Faetel, Cat. Couch. 

 1873, p. 99 ; Crosse, Journ. de Conch. 1875, p. 10. 



Placostylus {Charts) seemanni, Mousson, Journ. de Conch. 1870, 



