18 G.l^^eYill— List of tJie MoWuscn of [No. 1, 



Dr. Anderson found this variety in Upper Burma, where it was very 

 common. There are also specimens in the Museum from Ava and Thyet- 

 Myo. 



Axis 5, diam. 15 mil. 



var. EOTATOEIA, Busch. 



Selix rotatoria, v. d. Busch., Phil. Abb. 1842 (Java) ; Mouss., Moll. Java, pi. 2, fig. 8. 



Only distinguished from the preceding variety by the less distinct or 

 less excavated sutures, by the very acutely keeled periphery, and by the 

 very white, more thickened, and less rounded margins of the aperture, 

 showing within a distinct emargination at the j)eriphery. Plate 15, fig. 5 

 of the Con. Indica is an excellent representation of this form ; it only differs 

 from the figm'cs of Mousson and Philippi by its slightly more raised 

 spire. 



There are specimens in the Museum from Prome, Akoutong, Assam, 

 and Khasi Hills ; it was also found by Dr. Anderson at Manwyne and Shan 

 Hills. 



Specimen from Akoutong, axis 6, diam. 15^ mil. 



var. EHAMOENSis, nov. 



Distinguished from typical H. tapeina by the last whorl, which is only 

 slightly angular and not distinctly keeled ; the aperture is smaller and less- 

 produced, Avith the columellar margin slightly oblique and angular at base j 

 it is smoother and less depressed than var. rotatoria, Avith squarer aperture 

 and without the acute keel at the periphery. The raised spire and angulate 

 (not keeled) periphery agree with those of S. pJiayrei ; it is, however, 

 smoother, less openly umbilicated, with more contracted aperture and less 

 developed sculpture than that species. 



This variety connects S. tajjeina almost insensibly with S. catostoma, 

 Blf., and its varieties ; the more raised spire, less open umbilicus, and 

 more rounded and regular margins of the aperture, without any sign of 

 being thickened or subdentiform at their base, are the best distinguishing 

 characteristics. 



Four typical specimens of this variety were found at Bhamo. Major 

 God win- Austen has also presented some similar specimens from the Naga 

 Hills. Plate 15, fig. 10 of the Con. Indica looks to me as much like this 

 variety as it does the shell it is said to rej)resent (that is, H. Arakanensis, 

 Theob., J. A. S. B. 186i, p. 5), from which, however, it is easily distin- 

 guished by its more open umbilicus, less conically raised spire, and by the 

 absence of the acute keel at the periphery, &c. 



Type from Bhamo, axis 6|, diam. 12| mil. 



