GASTBOCOPTA, EAST INDIES, POLYNESIA. 151 



New Caledonian archipelago: Art Island, under leaves and 

 cocoanuts (coll. Montrouzier, and in the Bordeaux Mus.). 



The original figure is copied in fig. 14. Several lots seen. 

 The basal fold is generally rather large and subcolumellar in 

 position, but in some of the individuals from Anse Vata, New 

 Caledonia, it is small and has a more basal position, as in 

 typical pediculus. An infraparietal nodule occasionally is 

 seen. P. artensis is exactly the form named var. samoensis by 

 Mousson. 



'Var. samoensis Mousson. A little conoid, subhyaline, the 

 parietal tooth thinner, subduplicate, sometimes having a sixth 

 minute tooth between the columellar and the parietal. Upolu, 

 Samoa Is. Graeffe. 



' The type lives on the Marquesas Islands. This variety is 

 a thought more conic, more crystalline, in consequence of the 

 constant loss of the epidermis. The teeth, 5 in number, have 

 the same arrangement, three on the palate, of which the 

 middle one is strongest, one large one on the columella, and 

 finally a more elevated, doubled one on the wall of the pre- 

 ceding whorl. In some individuals a sixth little tooth also 

 may be seen on the same margin, between the columellar and 

 the principal teeth. These differences seem to me entirely 

 within the limits of a single species" (Mousson). 



Having seen many specimens from the localities given by 

 Mousson, including some collected by Dr. Graeffe, I agree with 

 Boettger that it is pediculus. The form is that with the basal 

 fold subcolumellar in position, as in artensis. A topotype is 

 figured, pi. 25, fig. 12. 



'Vertigo nit ens. Shell cylindrically oval, thin, pellucid, 

 imperforate, apex ; whorls five, rounded ; sutures impressed ; 

 aperture subquadrate, rounded at the corners; lip slightly 

 expanded and reflexed, furnished internally with three teeth, 

 about equal distances apart, one of larger size, and bipartite 

 on centre of columella, and one at the base. Colour white" 

 (Pease}. 



Marshall group: Ebon Island. Specimens I have seen 

 from Ebon, received from Pease, are typical pedwulus. Pease 

 himself seems to have doubted the distinctness of his species, 

 from his remark in Proc. Zool. Soc., 1871, p. 463. Garrett 



