382 W. Theobald & F. Stoliczka — Notes on Burmese Land Shells. [No. 4, 



A species closely allied to D. angulata, but more slender, with less dis- 

 tinctly angulated whorls, non-mammillated apex, with a slightly more dis- 

 tant costulation and with a comparatively smaller aperture. 



Only the solitary figured specimen of this shell was obtained on the 

 limestone hill at the so-called Farm-caves. 



Genus, G-eoeissa. 



1. Georissa Blanfordiana, Stol., (J. A. S. B., 1871, vol. xl, pt. ii, 

 p. 158, pi. vi, fig. 6,) described from a single specimen, occurred abundantly 

 both at the Farm-caves and South of Moulmain. The type specimen is 

 rather a young shell, which, when adult, attains a very distinct ovately 

 conoid form, the wborls being in proportion somewhat less convex ; the inner 

 lip is strongly thickened. One of the largest specimens measures : total 

 length 2"8, greatest width of the last whorl 2, height of aperture 2 - 2, its 

 width 1 m.m. 



"When alive, the shell is rather deep succineous and semi-transparent ; 

 old specimens become white. The operculum is of the usual form, very 

 thin, with a long internal process, pale coloured, becoming blackish towards 

 the centre. 



2. G. Baivesiana, Bens., also known from a single specimen, found at 

 the Farm-caves near Moulmain, occurred in numerous examples on two 

 limestone hills in the Ataran valley. The shell differs from G. liratula* by 

 a more conoid shape, particularly in the adult, and by a much finer spiral 

 striation, there being on the penultimate whorl as many as seven or eight of 

 these spiral striae, while in liratula there are only five of them. Young 

 specimens of both species are equally globose, and of a succineous structure. 

 One of the largest specimens of G. Bawesiana measures : length 2 "4, largest 

 diam. 1*8, height of aperture 1, its width 0*8 m.m. In adults the fine 

 sculpture wears off remarkably easily, and such specimens closely resemble 

 G. Blanfordiana, but have the whorls more convex, and the aperture pro- 

 portionately smaller. 



3. G. pyxis, Bens., a species common about Prome, also occurs on the 

 Kumah hill in the Sandoway district. 



4. Geoeissa eeateena, n. sp. PI. xi. Figs. 5 and 6. 



G. testa cylindraceo conoidea, solidula, pallida, imperforata, regions 

 umbilicali paulo impressa ; anfractibus 3|-, convexis, supra modice subtrun- 

 catis, sutura per-profunda junctis, spiraliter crasse liratis, liris in anfrac- 

 tu penultimo quinque, supera a sutura remotiuscula ; apice valde mam- 

 millato ; ultimo anfractu spird breviore, basi convexiusculo, spiraliter 



* J. A. S. B. vol, xl, pt. ii, 1871, p. 157, pi. vi, fig. 5. 



