384 Journal of the Asiatic Society of Bengal. >N.S., XIX. 1923.} 
whether the extension of the Himalaya is through the 
western mountains of Burma and the southern mountains 
of the Hastern Archipelago. On that problem depends, 
among other issues, the interpretation of the rivers which 
drain South-Eastern Tibet and the relations of the Brahma- 
putra to the Irrawadi. In the hope of contributing to the 
biology of this region and partly from the light its evidence 
throws on the geological history of South- Eastern Asia, we made 
some zoological and botanical collections. We are especially 
indebted to Dr. Annandale, Dr. Kemp and Dr. Prashad of the 
Zoological Survey of India, and to Prof. Tattersall and Major 
I’. C. Fraser, for their help and encouragement and for the 
promptitude with which they have worked out the Mollusca, 
Crustacea and Dragon-flies collected, and have described them 
in the accompanying papers. The general geographical work 
of the expedition has been described in a paper ‘The Alps of 
Chinese Tibet and their Geographical Relations ”’ (Geogr. Journ.. 
Vol, LXT, No. 3, 1923, pp. 153-79). A map based on a sketch 
map compiled by one of us (C.J.G.) and prepared under the 
supervision of Mr. Reeves at the nee Geographical Society, 
* wad issued with an panying note in the Geographical 
our: 

aper on the Banda Are and its bearing on the former 
eastward extension of the structural lines of the Eastern 
Archipelago has been published in the Geographical Journal 
(July, 1923, pp. 20-32). The general narrative of the expedi- 
tion is seibegea a in a volume entitled ‘“‘ To the Alps of Chinese 
Tibet.” A memoir on the geology and physical geography 
will, it is ee be completed shortly. 
ete ta eri en eT 
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