PARTULA, FIJI ISLANDS. 275 



it the section Thakombaua is here instituted. It is somewhat 

 remarkable that in Fiji no Partulas are known from the 

 islands inhabited by Placostylus. The same is true of the 

 New Caledonian group; but in the New Hebrides and 

 Solomon Islands both genera exist. 



63. P. LIBATA Mousson. PL 34, figs. 15, 16, 17, 18. 



The shell is long ovate-conic, rather thin, rimate; white, 

 pale yellowish, pale brown or rather dark liver brown with 

 narrow paler streaks. Surface lusterless. The embryonic 

 shell consists of nearly 3 whorls, the initial half whorl smooth, 

 following half whorl very subtly punctate-striate spirally, 

 spirals on the next whorl fewer, rather separated, and mainly 

 on the upper part ; third whorl with very weak spirals, which 

 at the beginning of the post-embryonic shell become distinct 

 but low cords. These increase in prominence to the last 

 whorl, where there are 8-12 strong spiral cords above the 

 periphery, with small, unequal cords in most of the intervals, 

 and on the base are many smaller unequal cords and threads. 

 These spiral cords extend to the lip-edge, which is crenulated 

 in all but old specimens. The last whorl is somewhat com- 

 pressed laterally -and convex at the base. Aperture ovate, 

 oblique, colored within like the outside. Peristome narrowly 

 expanded, thickened within ; columella dilated above. Parietal 

 wall covered with a distinct but transparent callus, which 

 bears a white callous tubercle far within near the root of the 

 columella. 



Length 18.2, diam. 9.8, aperture 9.5 mm. ; whorls 5%. 



" Length 21, diam. 10 mm.; whorls 5% " (Mouss.) . 



Fiji (Viti) Islands, only in the Eastern group: Lomma- 

 lomma, Vanua Balavo I.; Kanathia I.; Oneata I. (Dr. E. 

 Graeffe). Lanthala I., Vanua Balavo and Taviuni, on foli- 

 age near the sea-shore (Garrett), Maugo or Mago (Layard). 



Partula lirata MOUSSON, Journ. de Conchyl. xiii, 1865, p. 

 196 ; xviii, 1870, p. 126. CBOSSE, J. de C. xiii, 1865, p. 432, 

 pi. 14, f. 4. HEYNEMANN, Malak. Blatter xiv, 1867, p. 148, 

 pi. 1, f. 1 (teeth). GABRETT, P. Z. S. 1887, p. 187. H. H. 

 SMITH, Ann. Carnegie Mus. i, p. 451, no. 4236. 



