378 



MR. BERKELEY ON HIMALAYAN ALGJE. Appendix B. 



Himantidium (Soleirolii) 



Odontidium (hiemale, forma minor) 



Epithemia, n. sp. 



Cymbella 



Navicula, n. sp. 



Tabillaria (flocculosa) 



Odontidium (hiemale) 



Himantidium 



Odontidium (turgidulum) 



Epithemia (ocellata) 



Fragillaria 



Odontidium (twgidulum) 



Dictyocha (gracilis) . 



Odontidium (hiemale) 



4000 to 7000 feet. 

 5000 to 7000 

 7000 



6000 to 7000 

 11,000 

 16,000 

 17,000 



Sikkim. 



18,000 



Momay. 



Tibet. 

 Momay. 



Kinchinjhow. 



We now turn to those portions of Tibet or the neighbouring 

 regions, explored by Dr. Thomson and Captain Strachey. The 

 principal feature in the Algology is the great prevalence of species 

 of Zygnema and Tyndaridea, which occur under a variety of forms, 

 sometimes with very thick gelatinous coats. In not a single instance, 

 however, is there the slightest tendency to produce fructification. 

 Conferva crispata again, as mentioned above, occurs in several locali- 

 ties ; and in one locality a beautiful unbranched Conferva, with torulose 

 articulations. At Iskardo, Dr. Thomson gathered a very gelatinous 

 species of Draparnaldia, or more properly, a Stygeoelonium, if we 

 may judge from a little conglomeration of cells which appeared 

 amongst the threads. A Tetraspora in Piti, an obscure Tolypotlirioc, 

 and one or two Oscillatorice, remarkable for their interrupted mode 

 of growth, complete the list of Algse, with the exception of one, to be 

 mentioned presently ; as also of Diatomacece, and of the species of 

 Nostoc and Hor mo siphon, which occurred in great profusion, and 

 under several forms, sometimes attaining a very large size (several 

 inches across), especially in the districts of Le and Piti, and where 

 the soil or waters were impregnated with saline matters. It is well 

 known that some species of Nostoc form an article of food in China, 

 and one was used for that purpose in a late Arctic expedition, as 

 reported by Dr. Sutherland ; but it does not seem that any use is 

 made of them in Tibet, though probably all the large species would 

 form tolerable articles of food, and certainly, from their chemical 

 composition, prove very nutritious. One species is mentioned by 

 Dr. Thomson as floating, without any attachment, in the shallow 



