NOTICES OF BOOKS AND MEMOIRS. 155 



From this we see that the state of the non-aerated liquid on the 

 evening of the 25th May is almost similar to that of the aerated 

 liquid twenty-four hours before ; but that this is to be accounted 

 for by the greater multiplication of the yeast-cells in the latter 

 liquid. It is thus evident that the introduction of atmospheric 

 air — that is of oxygen — is favourable to fermentation. 



The fascicle likewise contains short papers on Mycoderma aceti 

 and a new species, M. Pasteur iumun ; or Horvath's hypothesis that 

 active repose and movement retard organic development, negatived 

 so far as relates to yeast by the just-mentioned experiments ; on 

 Oidium lactis ; and on red Saccharomyces and red cells resembling 

 Saccharomyces. It is accompanied by two well-executed plates. 



S. M. 



We 



Broseley, a specimen-sheet, with accompanying plate, of a Mono- 

 graph of the genus Crocus. The work, which is quarto, will 

 be completed in two volumes, containing about eighty coloured 

 plates from Mr. Maw's drawings, numerous wood engravings, and 

 about five hundred pages of letterpress. Mr. Maw recognises about 

 seventy species of Crocus ; the work will contain a description of 

 each, with full synonymy and life-history. 



Mr. W. B. Hemsley has issued a third part of his ' Diagnoses ' 

 of Mexican Plants. It is mainly devoted to Lefjuminosa, but con- 

 tains some plants of other Orders, including Leptorhaa, a new 

 genus of Commeli7iacece. 



Dr. Engler, of Kiel, has published the first part of an essay 

 on the evolution of the vegetable kingdom since the tertiary period, 

 under the title ■ Versuch einer Entwicklungsgeschichte der Pflanzen- 

 welt.' It relates to the extra-tropical regions of the northern 

 hemisphere. The same author has recently visited the London 

 herbaria in connection with the Monograph of Burseracea which 

 he is preparing for the ■ Suites ail Prodronius.' 



Other New Books. — F. von Mueller, ■ Eucalyptographia ' 

 (fifth decade), Triibner & Co. — H. Baillon, < Dictionnaire de 

 Botanique' (part 12, Cist Comi), Hachette & Co.— E. Braithwaite, 

 'The British Moss-Flora' (part 1, Andreaacea).— B. Anslow, 'The 

 Study of Mosses, with a List of the Mosses of the Wrekin," 

 Hobson k Co., Wellington Street. 



Articles in Journals. 



March. 



Journal of Lin. Soc. (London), xvii., Nos. 104-5.— G. Henslow, 

 'On the origin of the so-called Scorpioid Cyme.— D. Morris, 'On 

 the structure and habit of Hemileia vastatrix (the Coffee-leaf 

 disease).'— J. D. Hooker, ' On a variety of Cedrus Libani (var. 

 brevifolia) discovered in Cyprus.'— H. Marshall Ward, 'The 



