298 PUPILLID^. 



Pupa (Boi/sia) be^isoni, Nevill, Hand List, i, 1878, p. 194. 

 Boysia boysii, Kobelt, Illiisti-. Conchvl. Buch, ii, 1878, p. ''17%, 

 pi. 85, iig. 10. 



Original description : — " T. areuato-i'iinuta, coiupresso-couica, 

 tenuis, laevigata, diaphana, pallide coruea ; spira oblique conoiden, 

 obtusiuscula ; anfr. 5 convexi, ultinuis arcuatim ad niargineiu 

 superiorum autepenultimi ascendens ; apertura subtriangulari- 

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

 ginibus lamiua breviter soluta junctis. 



" Diam. niaj. 3^, alt. 3 mill." {Pfeijfer.) 



Bab. India: Chittore, Eajputana, and Azmere(J5o»/s); Xerbudda 

 Valley (Nevill, Stoliczka). 



The Cuming collection contains two specimens from Bengal, 

 while there are some shells from Maudata, 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, Beusou, A. M. N. II. ser. 2, xvii, 1856, p. 130. 

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



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



1900, p. 592. 



Type, Tanystoma tubiferum, Benson. 



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

 Islands, and Loo Choo Archipelago. 



Shell deeply umbilicate, depressed, conoid, wliorls 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 Xesoimpa and even TorqvUla than to Bifidarin. 



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. 



Hypselostoma tuherifernm, Adams, Gen. Moll, ii, 1858, p. 640, 

 pi. 138, fig. 4; Pfeitter, Novit. Conch, ser. 1, i, 1860, p. 130, 

 pi. 36, hgs. 1-4; Blanford, .1. A. S. B. xxxii, 1863, p. 326; 

 Stoliczka, J. A. S. B. xl, 1871, p. 173, pi. 7, tig. 1 (animal) ; 

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

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

 Struct. Svst. Conch, iii, 1884, p. 56. pi. 100, tig. 99; Cooke, 

 Cambr. Nat. Hist, iii, 1895, p. 302, fig.' 202 a. 



Pupa {Hypselostoma) tuhiferu, Nevill, Hand List, i, 1878, p, 193. 



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



