1870.] Brief notes on the Geology Sfc. of Nancowry harbour. 25 



10, 10 a. N. Austeni, sp. nov. natural size; p. 15. 



11, 11 a. N.falcata, sp. nov. ditto; p. 15. 



12, 12 a. JV. Koondaensis, sp. nov. ditto ; p. 16. 



13. JSF. apicata, sp. nov. ditto; p. 16. 



14, 14 a. Helix (Plectopylis) macromphalus, sp. nov., magnified 



2 diameters; p. 17. 



15. Bulimus vicarius, sp. nov., natural size ; p. 18. 



16. Glessula flosa, sp. nov., ditto; p. 19. 



17. G, Singhurensis, sp. nov., ditto; p. 19. 



^18. G. rugata, sp. nov., magnified 2 diameters, 18«. do. natural 

 size; p. 20. 

 19. G. lyrata, sp. nov., var. Matheranica, natural size; p. 21. 

 21. G. pulla, sp. nov., magnified 2 diameters, 20a do. natural 

 size ; p. 21. 



21. G. hebes, W. Blanf., natural size; p. 21. 



22. G. Tomensis, sp. nov., ditto ; p. 22. 



23. Succinea rutilans, sp. nov., natural size ; p. 23. 



24. 24 a. Succinea (Lithotis) tumida, sp. nov., magnified 2 diame- 

 ters ; p. 23. 



25. ditto. var. subcostulata, ditto ; p. 23. 



BEIEF NOTES ON THE GrEOLOGY AND ON THE FAUNA IN THE NEIGHBOUR- 

 HOOD of Nancowry harbour, Nicobar islands, — by V. Ball, 

 B. A., Geol. Survey of India. 



[Read 9th Oct. 1869, received 20th Oct. 1869.] 

 The following observations* nave been made on a short trip of 

 eight days to the new settlement at the Nancowry harbour, situated 

 between parts of the southern coast of Oamorta, and the nor- 

 thern coasts of the island Nancowry. To the north of the entrance 

 of the harbour lies Trinkut, to which also a short visit has been 

 paid. All three islands belong to the northern, or rather middle, 



* An abstract of the Journal has been published in the October Proceedings 

 of the Society for 1869, (p. 250), but as the Government of India has since 

 resolved to publish all the available literature regarding the history and 

 physical condition of the islands in their " Selections," the present account 

 has been restricted to those observations which may prove of immediate inter- 

 est to the scientific reader. 



