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since, such as the Turritis glabra, the Chenopodium hybridum, and the Triti- 

 cum pennatum, no longer are to be found there. The Carex microstachyra was 

 abundantly found eighteen years since in the environs of Pawlowsk, but has now 

 totally disappeared. 



Mr. Weinmann enumerates the following plants as no longer existing : — Lyno- 

 surus cristatus, Illatine hydrapepa, Barbula rigida, Fontinelis foliata, Anthoce- 

 ros punctatus, and Draba lutece. It would be highly interesting, if analagous 

 facts are known in this country, that some of our able contributors would favour 

 us with their observations on this extraordinary phenomenon. 



3. — Mr. Corda, of Prague, has made some discoveries of animalculae living in 

 innumerable societies, near the hot springs of Carlsbad, in Germany : they are all 

 of singular and novel forms. The presence of these myriads has often inspired a 

 repugnance to invalids drinking the waters : he recognised forty-two new species. 

 Mr. Ehrenburg has pursued similar researches, and added eight other well charac- 

 terisedspecies, mostly unknown ; he calls them — Navicula striatula (of Purpin), 

 N. umbonata, N. hippocampus and striata (these two are also found in the Baltic 

 Sea), Trustulea appendiculata (Agarh), Navicula quadricostata, N. arcus, 

 Monas violacea. These four last species inhabited the Carlsbad water, and are 

 found no where else. 



4. — Mr. P. E. Botta, the travelling Naturalist of the Paris Museum, writes 

 from Tor that he will shortly forward to France the collection he has already form- 

 ed : he is about to explore a portion of Egypt and Arabia, and is now directing his 

 steps towards Djidda and Mocalla, where he will embark for the Yemen. The 

 information he had acquired respecting these countries, so rich in objects of Natu- 

 ral History, induce us to hope that he will be able to proceed so far into the inte- 

 rior as to collect a rich harvest of specimens hitherto but very imperfectly known, 

 from the appalling difficulties which attend European travellers in those expedi- 

 tions. The experience, knowledge, and zeal of this young Naturalist, who has 

 already traversed many points of Africa, and completed a voyage round the world, 

 render it likely that science will be immensely enriched by his present researches. 



