Appendix B. DR. R. D. THOMSON ON MINERAL WATERS. 375 



and I have fine fibrous specimens of sulphate of lime accompanied 

 with sulphur, from the hot springs of Pugha in west Tibet, brought 

 by Dr. T. Thomson. 



3. Mineral water, Momay hot springs, (vol. ii., p. 133). — When 

 the bottle was uncorked, a strong smell of sulphuretted hydrogen 

 was perceived. The water contains about twenty-five grains per 

 imp. gallon, of chloride of sodium, sulphate and carbonate of 

 soda ; the reaction being strongly alkaline when the solution was 

 concentrated. 



4. Effloresced earth from Behar (vol. i., p. 13), consists of granite 

 sand, mixed with sesquicarbonate of soda. 



On the Indian Algce ivJiich occur principally in different parts of the 

 Himalayan Range, in the hot-springs of Soornjkoond in Bengal, 

 Pugha in Tibet, and Momay in Silchim; and on the Fungi of the 

 Himalayas. By the Eev. M. J. Berkeley, M.A. 



It is not my intention in the present appendix to give specific 

 characters or even accurately determined specific names to the 

 different objects within its scope, which have come under investiga- 

 tion, as collected by Dr. Hooker and Dr. Thomson. To do so 

 would require far more time than I have at present been able to 

 devote to the subject, for though every species has been examined 

 microscopically, either by myself or Mr. Broome, and working 

 sketches secured at the same time, the specific determination of 

 fresh water Algae from Herbarium specimens is a matter which 

 requires a very long and accurate comparison of samples from every 

 available locality, and in the case of such genera as Zygnema, 

 Tyndaridea, and Conferva, is, after all, not a very satisfactory 

 process. 



The object in view is merely to give some general notion of the 

 forms which presented themselves in the vast districts visited by the 

 above-mentioned botanists, comprising localities of the greatest 

 possible difference as regards both temperature and elevation; but 

 more especially in the hot-springs which occur in two distant parts 

 of the Himalayas and in Behar, and these again under very different 

 degrees of elevation and of extrinsic temperature. 



