Vol. IX, No. 10.] The Limestone Caves of Burma. 411 
[NV.8.] 
trunks in which, owing to the coalesence of the buttresses 
characteristic of some jungle trees, pools of water accumulate. 
t is sometimes almost amphibious in habits. 
The Batrachia recorded from the Batu Caves are noctur- 
nal species that also occur in the jungle and have no particular 
spelaeological interest. 
MOLLUSCA. 
Literature. 
1871. Stoliczka, Journ. As. Soc. Bengal, XL (2), pp. 148, 
217. 
1902. Collinge, Journ, Malac. IX, p. 71. 
1903. Sykes, Proc. Zool. Soc. London, vol. 1, p. 194. 
1908. Blanford and Godwin-Austen, Faun. Brit. Ind., 
Mollusca, I. 
1910. Preston, Rec. Ind. Mus., V, p. 33. 
In addition to the species of Mollusca included in our list 
there are others that have been found occasionally in caves ; 
for some land-snails occurring only on the limestone cliffs o 
the Siamese Malay States and Tenasserim, and also others of 
less restricted range (e.g. several species of Rhiostoma and 
Cyclophorus), occasionally make their way into caverns, while 
floods not infrequently wash in the shells of water-snails such 
as Ampullaria and Vivipara. Some of the terrestrial species 
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poses of protection or to seek food. The Streptaxis is so com- 
mon in the Farm Caves that we see no reason to think that it 
does not do so, while the Prosopeas occurs not infrequently in 
enormous numbers in the darkest part of the Jalor and Selangor 
Caves, apparently feeding on bats’ dung. Opeas mnocens, 
Preston, is only known from the Farm Caves, in which, how- 
€ver, only dead shells were found. 
under overhanging cliffs as well as in caves. ? si the 
The other molluscs, the names of which are given In 
