1871.] F Stoliczka — Notes on Terrestrial Mbllusca. 225 



and Fruticicola, if IT. similaris and bolus, and others, are to be con- 

 sidered as belonging to the latter. These species evidently pass 

 gradually through H. tapeina, Bs., Huttoni, Pfr., H. Oldhami, Bs., 

 to the more acutely carinated species, as Osbecki, Phil., trichotropis 

 and elegantissima, Pfr., for the last of which Albers proposed the 

 name Plectotropis. H. gabata was incorrectly referred by Al- 

 bers to the latter genus, while the closely allied species, H. deli- 

 brata, is referred by him to Planospira. Albers places R. rota- 

 toria in his new genus Discus, (a name which cannot be used), 

 and refers it to the Zonitid^. The type of his Discus is H. Met- 

 calfi, Pfr., which is most likely a Trochomorpha, a genus to be 

 placed at the end of the ZoNiTiDiE, being in many respects inter- 

 mediate between this family and the Helicid^. Mr. Blanford's 

 Sivella, proposed for II. castra, Bens., is also to be united with Tro- 

 cliomorplia. The animal has an undivided sole to the foot, but a very 

 faint mucous groove at its upper posterior end. 



H. Huttoni is found in Albers' list among the Rotulcd, and there 

 are a great number of other similar misplacements in that author's 

 lists regarding the Indian and Malayan Helicea ; some of the 

 more evident mistakes have already been pointed out by Mr. W. T. 

 Blanford in his numerous conchological papers. 



Teachia delibbata, Bens., pi. xvi, figs. 1 — 3. 



Helix, delibrata, Benson, Journ. A. S. Bengal, 1836, vol. v, p. 352 ; eadem 

 Pfeiff., Chem., Phil., Reeve, &c. Hanley and Theob., Conch. Inclica, pi. xiv, 

 fig. 4, (H. gabata), and figs. 9 — 10. 



The form described from Tavoy by Gould as H. procwmbens 

 (Bost. J., 1844, vol. iv, p. 453, pi. xxiv, fig 1), represents a peculiar 

 variety, which is figured by Eeeve, while Chemnitz' figure is most 

 probably taken from a Khasi hill specimen. The Tavoy form 

 which also occurs at Moulmein, (though rather rarely), has the 

 whorls rapidly increasing, the spire flat or very little elevated, the 

 last whorl considerably descending and the inner lip very narrow, 

 giving, so to say, a trumpet shape to the aperture. The usual 

 size is 18 — 20 m.m. The surface is covered with a pale oliva- 

 ceous or brownish cuticle, distinctly hairy in young specimens, 

 but becoming almost perfectly smooth and shining in older ones ; 



29 



