1871.] F. Stoliczka — Notes on Terrestrial Mollusca. 251 



ther Blanford's mucosa, and in that case also lecythis and vesicida of 

 Benson belong to the same genus or subgenus, I am not at present 

 prepared to affirm. 



Genus, Microcystis, Beck. 

 (Semper, in Reisen im Arch, der Philipp., Ill, pt. i, p. 43.) 

 This genus does not appear to have many representatives in 

 India, unless some of the small species, like IT. Neherensis, petasus, 

 patane of Benson &c, should prove to be more related to it, than 

 to Macrochlamys, though this is not very probable. A few Himala- 

 yan species, like Hod gsoni, rorida, &c, are, however, probably refer- 

 able to Microcystis* 



Microcystis molegula, Benson, pi. xviii, figs. 11-13. 

 Helix molecula, Benson, Ann. Mag. N. H., 3rd ser., Ill, p. 389. 



The species is very common about Moulmein, Rangoon and on 

 the Arracan coast, on limestone as well as on sandstone hills, not 

 uncommonly also on foliage. Specimens measuring 4 mm. in the 

 large diameter, and 3 mm. in height, may be considered of large 

 size ; those usually met with are somewhat smaller. The largest 

 specimen was obtained at Zwagabin on the Salvin river ; it is rather 

 pale brownish green; larger diam. 5.6, smaller diam. 5, height 4.5 

 mm. ; this form approaches Helix Poongee, Theob. 



The animal is grey, varying in shade, sometimes almost black ; 

 foot moderately narrow, paler at the sides ; lateral line distinct ; 

 sole with two grooves ; tail gland distinct, with a hook-like appen- 

 dage above it ; length of the animal 3 — 4 times the diameter of 

 the shell. The left mantle lobe is reflected over the outer lip, 

 but is not much produced, right mantle lobe above shortly linguate. 

 The genital organs are quite simple. The uterus has no appen- 

 dages ; it terminates with a long, narrow, albuminous gland, and 

 the hermaphrodite duct is of great length. The vas deferens 

 branches off at about the middle length of the uterus ; it has a 

 small calciferous sac where it passes into the penis, which is attached 

 by a short muscle, and after a short twist at about the middle of 

 its length enlarges into a muscular, soft, spongy thickening ; this 

 enlargement did not contain calcareous particles. No seminal 



