332 POLYNESIAN NESOPUP^E. 



Dr. Boettger remarks that this gives the impression of a 

 separate species, mentioning the long, deeply penetrating 1 

 upper palatal fold and the funnel-like extended aperture: 

 yet he ranks it as a subspecies of tantilla on account of the 

 analogous upper palatal of tantilla var. dentifera Pse., and 

 the near agreement in form of the last whorl in tantilla. subsp. 

 vitiana. 



28. NESOPUPA VITIANA (Boettger). PI. 31, figs. 18 to 23. 



"Shell more solid [than tantilla GUI.], more globulose, the 

 spire almost exactly conic, the apex always more acute. Rib- 

 lets more delicate and less distant. Otherwise it is more like 

 subsp. tongana Semp. in the last whorl and aperture, but 5 

 to 6-toothed : 1 angular, 1 parietal, 1 or 2 coluuiellar lamella?, 

 2 or 3 palatal folds, the upper one hardly lamelliform and 

 not larger than the lower. Peristome with the margins either 

 separated or joined by a very thin callus, distinctly labiate, 

 a little thickened below the sinulus (Boettger). 



"Length 1.75 to 2, width 1.25 to 1.4 mm. Oneata; pi. 31. 

 f. 18-21. 



"Length 1.75, width scarcely 1.25 mm. Viti Levu ; pi. 31, 

 f. 22, 23. 



Viti group : Oneata, Vanua Balava, Kanathia and Viti 

 Levu (Godeffroy I\Ius., and according to Alb. Mousson). 



[Pupa tantilla] subsp. vitiana BOETTGER, Conchol. Mitt- 

 heil., i, p. 55, pi. 11, f. 8-10. Pupa tnntilla Gould, MOUSSON,. 

 Jouru. de Conchyl., 1870, p. 127.-- ? [Vertiyo tantilla] var. 

 oneatensis of Boettger, according to ANCEY, Bull. Soc. Malac. 

 France, iv, 1887, p. 34, footnote (Oneata, Viti). 



What appeal's chiefly to characterize the Viti Island form 

 is the constant, ventricose-conic shape of the shell, which of 

 course differs quite conspicuously from the purely ovate shape 

 of typical P. tantilla Gould of Tahiti (Boettger). 



Ancey says that Boettger described a var. oneatensis of 

 Vertigo tantilla, the type being in his collection ; but no such 

 description exists to my knowledge, and the form referred to 

 is probably vitiana. 



