294 PUPILL1D.E. 



Prof. Pilsbry in proposing the subgenus Bensonella in 1900, 

 with Pupa plicidens as type, seems to have ignored the fact that 

 Ancey had already included the species in the section Boysidia, 

 established for the reception of Pupa dorsata, for he makes no 

 allusion to it, although on the next page he reduces Boysidia to a 

 subgenus under Hypselostoma, a procedure in which 1 am unable 

 to follow him, for I believe a greater affinity exists between 

 plicidens and liunana than between the latter and the genus 

 Hypselostoma. 



Besides the two species referred to, some other Chinese forms 

 belong here, i.e. Pupa liunana, Grredler*, P. stropJiostoma, Mollen- 

 dorff t, P. angulina, Gredler J. 



264. Boysidia plicidens, Benson. 



Pupa plicidens, Benson, A. M.N. H. ser. 2, iv, 1849, p. 126; Kiister, 



Conch.-Cab., Pupa, 1852, p. 136, pi. 17, figs. 23, 24; Pfeiffer, 



Mon. Helic. Viv. iii, 1853, p. 553 ; Hanley & Theobald, Conch. 



Ind. 1874, pi. 100, fig. 8 ; Sowerby, Conch. Icon, xx, 1876, Pupa, 



pi. 16, fig. 151. 

 Vertigo (Odontocy das) plicidens, Adams, Gen. Rec. Moll, ii, 1855, 



p. 173. 

 Pupa (Scopelophila) plicidens, von Martens, Die Ileliceen, ed. 2, 



1860, p. 296. 



Pupa (Scarabella) plicidens, PfeifFer, Malak. Bla'tt. ii, 1876, p. 175. 

 Pupa (Odontocy das) plicidens, PfeifFer & Clessin, Nomencl. Helic. 



Viv. 1881, p. 350. 

 Pupa (Boysidia} plicidens, Ancey, Le Naturaliste, No. 47, 1881, 



p. 373. 

 Bifidaria (Bensonella) plicidens, Pilsbry, Proc. Acad. Nat. Sci. 



Philadelphia, 1900, p. 591. 

 Jnv.?=sHydrocena milium (Benson), Godwin-Austen, P. Z.S. 1872, 



p. 515, pi. 30, fig. 3. 



Original description : " T. urnbilicata, ovato-conica, subtrochi- 

 formi, glabriuscula, obscure striata, cornea ; anfractibus quinque 

 convexis, ultimo ventricoso, antice ascendente, ad basin tumido ; 

 sutura impressa ; apice obtuso ; apertura irregular! subtriangulari, 

 9-plicata ; peristomate continuo, sinuato, expanso, marginibus 

 callo appresso expanso junctis ; dextro medio extus impresso, 

 intus tuberculato-incrassato ; plicis parietalibus 3, quarum 2 

 superioribus elongatis, columellari dentiformi, unica, palatalibus 

 5, quarum 2 sub-basalibus, minutis ; margine basali extus callo 

 prsedito ; umbilico angusto. 



"Long. 2, lat. 1| mill." (Benson.) 



Hal. India : Landour (Hutton) ; Mussoorie ; Cherra Poonjee, 

 Assam ( Godwin- Austen) . 



* Gredler, Jahrb. Deufcs. Malak. Ges. viii, 1881, p. 23, pi. 1, fig. 5; Heude, 

 Moll. Terr. Vail. Fl. Bleu, 1882, p. 76, pi. 18, fig. 25. 



t Jahrb. Deuts. Malak. Ges. xii, 1885, p. 395, pi. 11, fig. 23. 

 + Conchyl. Fauna von China, viii, 1885, p. 7. 



