298 PUPILLID^E. 



Pupa (Boysid) bensoni, Nevill, Hand List, i, 1878, p. 194. 

 Boysia boysii, Kobelt, Illustr. Conchyl. Buch, ii, 1878, p. 278, 

 pi. 85, tig. 10. 



Original description : " T. arcuato-rimata, compresso-conica, 

 tenuis, Isevigata, diaphana, pallide cornea ; spira oblique conoiden, 

 obtusiuscula ; anfr. 5 convexi, ultimus arcuatim ad marginem 

 superiorum aatepenultimi ascendens ; apertura subtriangulari- 

 rotundata, edentula ; perist. subsiinplex, expansiusculum, mar- 

 ginibus lamina breviter soluta junctis. 



" Diam. maj. 3|, alt. 3 mill/' (Pfeijfer.) 



Hab. India : Chittore, Eajputana, and Azmere (Boys} ; Nerbudda 

 Valley (Nevill, StoliczJca). 



The Cuming collection contains two specimens from Bengal, 

 while there are some shells from Mandata, on the Nerbudda, 

 in the Theobald collection. The latter are smaller than the 

 type, their dimensions being : major diam. 2-5, minor 2, alt. 

 2'5 mm. 



Genus HYPSELOSTOMA, Benson. 



Tanystoma, Benson, A. M. N. H. ser. 2, xvii, 1856, p. 130. 

 Hypselostoma, Benson, torn. cit. p. 342 (nom. mut.) ; Fischer, Man. 



Conchyl. 1885, p. 478; Pilsbry, Proc. Acad. Nat. Sci. Philadelphia, 



1900, p. 592. 



TYPE, Tanystoma tubiferum, Benson. 



Range. Burma, Farther India, China, Malaysia, Philippine 

 Islands, and Loo Choo Archipelago. 



Shell deeply umbilicate, depressed, conoid, whorls few, the last 

 solute, twisted ; aperture oblique or horizontal on a level with 

 the apex, denticulate. 



Anatomy unknown. 



A peculiar genus of Mollusca, the type of which is, as 

 Prof. Pilsbry aptly observes, one of the most extreme modi- 

 fications and not a fair criterion. He considered the genus 

 rather nearer to Nesopupa and even Torquilla than to Bifidaria. 



Burma has produced three species, the other two, unlike the 

 type, having the aperture but slightly oblique, almost vertical, 

 instead of horizontal, in a plane with the apex. 



267. Hypselostoma tubiferum, Benson. 



Tanystoma tubiferum, Benson, A. M.N. H. ser. 2, xvii, 1856, p. 130. 



Hanley & Theobald, Couch. Ind. 1870, pi. 8, fig. 3; Kobelt, 

 Illustr. Conchyl. Buch, ii, 1878, p. 278, pi. 85, fig. 44 ; Tryon, 

 Struct. Syst. Conch, iii, 1884, p. 56, pi. 100, fig. 99; Cooke, 

 Cambr. Nat. Hist, iii, 1895, p. 302, fig. 202 A. 

 Pupa (Hypselosioma) tubifera, Nevill, Hand List, i, 1878, p. 193. 



Original description : " Testa depresso-conoidea, radiato-striata, 



