14 JOURNAL, R.A.S. (CEYLON). [VOL. XV. 



in May-August. The eggs are 8 mm. long and 4 mm. in 

 width. They are oval, pointed at the ends, and carinated 

 longitudinally ; they are pure white in colour and quite 

 soft (uncalcified). 



Habitat amongst decaying vegetation. Young animals are 

 of a brick -red colour, visible through their translucent shells. 



6. — H. ceylanica, Pfr. 



This species is abundant in Lower Ambagamuwa, but it 

 is not found in the upper part of the district. 



Habitat among fallen leaves in damp shady localities ; 

 2,000 ft. 



7. — H. semidecussdta, Pfr. 



I have found this species fairly common throughout the 

 district. It occurs among fallen leaves in forest and scrub, 

 and is much preyed upon by birds, with whom it appears to 

 be a favourite food. I have occasionally come across a 

 sacrificial stone in the jungle surrounded by heaps of broken 

 shells. When alive the animal, which is mottled black and 

 white, gives a handsome " checked " appearance to the 

 reddish-brown translucent shell. The body whorl of young 

 specimens is acutely angular. 



According to the Gonchologia Indica this is essentially 

 identical with the Mauritian species. 



8. — Ernstia aspirans, Blanf . 



This species usually appears in very wet weather. I have 

 then often found it on the trunks of orange trees in bungalow 

 gardens. Height 3*33 mm., diameter 3 mm. 



9. — Microcystis suavis, Jouss. 



This species occurs sparingly here. The animal, when 

 alive, gives a dark olive tint to the transparent shell. 



Habitat among ferns and moss in shady localities. Height 

 2*50 mm., diameter 4 mm. 



10. — M. Thwaitesii, Pfr. 

 I have only found a few of this species in the district. One 

 of them Dr. Jousseaume describes as an unusually large and 



