CYUNDROVERTILLA. 47 



3. CYLINDROVERTILLA PABREANA (Crosse). PL 5, figs. 5, 7-9, 



12, 13. 



Shell umbilicate, sinistral, subovate-oblong, thin, trans- 

 lucid, scarcely shining, corneous. Spire moderately elevated, 

 the apex obtuse. Suture lightly impressed. Whorls 5, con- 

 vex, regularly increasing, the last shorter than the spire 

 (i . i$) 9 strongly scrobiculate or pitted outside where the 

 outer passes into the basal margin. Aperture subvertical, 

 semioval, contracted by three folds colored like the shell: 

 first a strong parietal, second marginal [palatal], deeply 

 placed, third columellar. Peristome narrowly expanded, a 

 little thickened, corneous-whitish, the basal margin thickened 

 within at the place of the external pit, the outer margin some- 

 what inflexed in the middle. 



Length 1.5, diam. % mm. (Crosse). 



New Caledonia: Vata, near Noumea (E. Marie). Austra- 

 lia: Boyne Island, Queensland (Musson). 



Pupa fabreana CROSSE, Journ. de Conch., xx, 1872, p. 359 ; 

 xxii, 1874, p. 392, pi. 12, f. 6. PFR., Monogr., viii, 391. 

 BOETTGER, Conchol. Mittheil., i, p. 63. Vertigo fabreana 

 CROSSE, Journ. de Conch., xlii, 1894, p. 304 (1896). 



A species very close to Pupa paitensis, which is also sinis- 

 tral, but to be distinguished as follows: the shell is umbili- 

 cate, not perforate-rimate, oblong rather than ventricose, a 

 little more glossy, the spire less conic, whorls 5 instead of 4%, 

 the last smaller than the spire and externally having two pits, 

 the aperture with three teeth instead of one (Crosse). 



The larger angular and upper-palatal folds and especially 

 the thickening of the callus within the basal lip characterize 

 this species, of which topotypes (figs. 7, 8, 9) from Marie and 

 G. Dupuy have been examined. The original figure of Crosse 

 is copied in fig. 5. 



The shell is chamois-colored, weakly, faintly striate, with 

 traces of fine malleation on the last whorl. Behind the lip 

 there is a rather deep, wide impression or pit over the upper 

 palatal fold, the whorl swollen above and below it, and on the 

 base there is another impression close behind the lip. The 

 aperture is small, oblique. The expanded peristome has a 



