INDEX. 



Africa, South, Mr Livingston's researches in, 164. 



Agassiz, Professor, recent researches on fishes, by, 295. 



Agate, the structure of, described, 359. 



Almaden Mine, California, 364. 



Animal and vegetable fibre, remarks on, 317. 



Animals, colour of, by Professor Agassiz, 192. 



Animals and plants, transition from one to the other, 290. 



Arctic currents, remarks on, 292. 



Expeditions, observations on, by Augustus Petermann, 159. 



Arragonite, formation of, 190. 

 Aurora borealis, the light of, noticed, 



Barry, Dr Martin, on animal and vegetable fibre, 317. On the 



penetration of spermatozoa into the interior of the ovum, 326. 



Researches in embryology, by, 327. On the Hungarian 



nightingale, 369. 

 Biography of Baron Leopold von Buch, 1, 

 Black, W., Esq., the South African Fish River Bush described by, 



72, 195. 

 Boue, M. Ami, on the palseohydrography and orography of the 



earth's surface, 298. 

 Brochantite, formation of, 190. 

 Brodie, Sir Benjamin, the Anniversary Address to the Ethnological 



Society of London by, 352. 

 Buch, Baron Leopold von, Noggerath's biography of, 1. 

 Bunsen, Professor, remarks on volcanoes, by, 276. 



Cairo, a mineral water discovered near, described by Leonard Horner, 



Esq., 284. 

 Calc spar, formation of, 190. 



Cave, Mammoth, of Kentucky, description of, 119. 

 Chambers, Robert, Esq., on the eyeless animals of the Mammoth 



Cave of Kentucky, 107. 

 Cleavage, the origin of, by H. Clifton Sorby, 137. 



Dalton, Dr J. C, an account of the Proteus anguiuus, by, 352. 

 Dalzell Dr Allen, on the colour of hair, 329. 



