22 G. Nevill— Z/525 of tie Mollusca of [No. 1, 



soem to me perfectly identical, except thiat var. hariola is keeled at the 

 periphery. 



Helix (Doecasia) similaeis, Fer. 

 Helix similaris, Fer. Trodr., 1821. 



Found abundantly at Prome, Pagan, Bhamo, and Sanda, with and 

 without the brown band at the periphery ; specimens agree exactly with 

 others in the Museum from Penang, Shanghai, and Thyet-Myo ; specimens 

 from Mauritius, Bourbon, Seychelles, and Brazil differ slightly, but most 

 certainly belong to one and the same species. 



Axis max. 9|, diam. max. 16| (apert. alt. 8|-, diam. 8i mil.). 

 Helix (Doecasia) bolus, Bens. 

 Helix bolus, Bens., A. & M., 1856 (Prome). 



H. tourannensis, Soul., Voy. Bonite., PL 29, fig. 1-2 (Cocliin China.) ; 

 Con. Indica, pi. 23, fig. 7. 



Dr. Anderson found this species very abundant at Pagan, Upper Burma, 

 and at Ponsee and Sanda in Yunnan ; typical specimens from Prome are 

 exactly similar ; specimens of var. tourannensis, from Cochin China, only 

 differ by the spire being slightly more raised. 



Helix (Doecasia) zoeoastee, Theob. 

 Helix Zoroaster, Theob., J. A. S. B. 1856 (near Ava) ; Con. Indica, pi. 86, figs. 2, 3, 



This species can be constantly distinguished from H. similaris by its 

 larger and more depressed form, by the considerably more open umbilicus, 

 the more angulate last whorl, and the more produced aperture, the columel- 

 lar margin of which is much more oblique. It was found abundantly at 

 Prome, Thyet-Myo, Pagan, Tsagain, and Manwyne. 



Axis max. 9|, diam. max. ISi mil. (apert. alt. 9, diam. 10.) 



Helix (Doecasia) scalptueita, Bens. 

 Helix scalpturifa, Bens., A. & M., 1859 (Ava) ; Con. Indica, pi. 53, fig. 9. 



This fine species was found abundantly at Tsagain, Ava, Mandalay, and 

 Second Defile, Irawady ; it can be distinguished from both the preceding 

 species by the rounded whorls and raised spire and by the height of the aper- 

 tm'e ; the brown band is almost always A^ery distinct and richly coloured, 

 in one or two specimens only is it obsolete. Though undoubtedly this and 

 the two preceding forms are most closely connected, I consider all three at 

 present as well-established species. 



Axis. max. 13, diam. max. 21| mil. (apert. alt. 11, diam. llf). 



Pupa (Ctlindeus) insulaeis, Ehr. 

 Fiqja insularis, Ehr., Symb. Phy. (Red Sea) ; P. pulla, Gray, P. Z. S. (Banks of the 

 Ganges). P. cylinclrica, Hut., J. A. S. B. 1834 ; Bulimus insularis, Ehr., Con. Indica, 

 PI. 22, fig. 10. 



