BOYSIDIA. 



295 



"This shell is very peculiarly formed, and seems to indicate 

 the transition from Pupa to Anostoma. The animal has four 

 tentacula, the superior pair bearing the percipient points or eyes, 

 the inferior very short. The foot is hyaline, the tentacula and 

 neck fuscous. The shell is carried horizontally." {Benson.) 



The only known Indian form of .this genus. It somewhat re- 

 sembles Ihipselostoma bensoni, but is more conoid, the umbilicus 

 is a mere' puncture, too small even to admit a bristle, and tlie 

 last whorl is much less dilated towards the aperture. Of _ the 

 three parietal lamella?, the two principal ones are deeply entering; 

 the upper or outer runs as far as the margin of the peristome ; 

 the second is compressed, much more elevated anteriorly, being 

 triangular, and terminates a little furtlier from the peristome: 

 the third (inner) or infra- parietal is very small and deep-seated. 

 The palatal denticles are rather deep-seated, elongated, com- 

 pressed, and usually five in number, ttie three upper largest, 

 the other two basal, minute, especially the fifth ; another com- 

 pressed elongated denticle occurs on the columella. All these are 

 distinctly visible through the shell-wall from the outside. In 

 addition' there is a small conical denticle on the edge of the 

 outer margin of the peristome, with a corresponding scrobi- 

 culation on the outer side. This latter feature is not mentioned 



by Benson. ti • • i 



The species appears fairly common, for the British Museum 

 possesses forty speciuiens from Mussoorie presented by Hutton, 

 fifteen specimens from Landour, and in the Theobald collection 

 there are seven shells from Cherra Poonjee. The McAudre\\- 

 collection also contains a considerable number. 



265. Boysidia salwiniana, Theobald. 



Pupa sahviniana, Theobald, J. A. S. B. xxxix, 1871, p. 400; 



Hanlev & Theobald, Couch. Ind. 1874, pi. 100, fig. 9 ; Sowerby, 



Conch. Icon, xx, 1876, Pupa, pi. 16, ho:. 150; Pfeifler, Mou. 



Helic. Yiv. viii, 1877, p. 403. 

 Pupa {Scopelophila) sahviniana, Nevill, J. A. S. B. xlvi, 18v /, p. 2:} ; 



ibid., Ilaud List, i, 1878, p. 192 ; ibid., in Audersou, Zool. lies. 



Two Exp. W. Yunnan, i, 1879, p. 882. 

 Pupa (Pupilla) sahviniaiio, Pfeiffer & Clessin, Xomeucl. Helic. ^ iv. 



1881, p. 355. 

 Pupa salwineana, Godwin- Austen, P. Z. S. 1888, p. 244. 



Original description : — " Testa pyramidata, rimata, fusco-cornea, 

 epidermide Itevi induta ; anfractibus 6, convexiusculis, sutura 

 impressa junctis, ultimo ad aperturam breviter ascendente ; aper- 

 tura rotunde oblonga, parum dilatata et tertiam longitudinis 

 superante, dentibus quinque, albidis instructa : dente primo 

 parietali magno, lamellari, mediano, alteroque parietali minimo 

 juxta suturam posito, tertio parvo umbilicum juxta, quarto 

 (piintoque in iabro submediauo et ad basin sitis, modicis, a^qui- 

 distantibus ; Iabro simplici, non retiexo. 



