220 NOTICES OF BOOKS AND MEMOIRS. 



Mr. Fred. Townsend lias printed and sent out to botanists 

 some ' Notes on the flora of Hampshire,' in the hope that he may 

 thus obtain additional information and the correction of errors, 

 before he publishes his Flora of the county. Two lists are given ; 

 first, of species found in mainland Hants, but absent from the Isle 

 of Wight, or from one or more of the adjoining counties of Wilts, 

 Dorset, Sussex, Surrey, or Berks ; second, of species absent on the 

 mamland of Hants, but found in one or more of the same counties, 

 including Wight. The first list contains 316 species; or, 

 excluding 74 maritime species, 242 ; the second, 110. From 

 these lists it appears that Surrey and Sussex most nearly 

 approach Hants in j)ossessing with it 176 and 174 respectively, 

 of the 242 plants of the first list ; whilst, contrary to wdiat would 

 be expected, the same two counties most difl'er from Hants 

 in possessing most species of the second list, viz., 62 and 44 

 respectively, out of the 110 absent from Hants. The author 

 adds, " The explanation of this apx^arent contradiction lies, 

 I believe, in the fact that the newer or Germanic flora, spreading 

 from the east, is naturally more developed in the counties of 

 Surrey and Sussex than in Hants mainland (to which, nevertheless, 

 the latter owes the main features of its flora, if we except 

 Mr. Watson's 'English' species), or in the counties still further 

 westward; whilst the Isle of Wight was, in all probability, 

 very early cut ofi' from the mainland, before the eastern flora had 

 time to become more fully developed. Of the 19 species found 

 on the island, but not on the mainland, only 3 are of the 

 Germanic type, whilst 7 are of the Atlantic type, and 4 of 

 the English type. Of the 153 species in the mainland which 

 are not in the island, 65 are of the English type, 22 of the 

 Germanic, and only 7 of the Atlantic type." Mr. Townsend 

 intends to divide his Flora into districts founded on river-basins, 

 and devotes the conclusion of his useful paper to his reasons for 

 preferring this natural division to an artificial one. 



New Books. — ' The Botanical Text Book,' Edition 6. Part I., 

 Structural Botany, by Asa Gray, LL.D. (Ivison & Co., New York), 

 1879. — ' Floral Dissections illustrative of typical genera of the 

 British Natural Orders.' Lithographed b}^ the Eev. G. Henslow, 

 M.A., &c. (Stanford, London), 1879.— F. M. Bailey and K. T. 

 Staiger, 'An illustrated Monograph of the Grasses of Queensland,' 

 vol. i., 1878 (42 plates). (Brisbane, lithographed by Warwick & 

 Sapsford.) 



Articles in Journals. — May. 



J^ot. Zeitinifj. — E. Strasburger, 'New observations on cell- 

 formation and cell-division' (contd., tab. 4). — A. Tomaschek, ' On 

 vegetative reproduction of a young plant of Equisetiim ixdustre.' — 

 G. Becker, ' Diagnostic notes on Ranmiculus.' — F. von Hohnel, 

 ' On the cause of the rapid decrease of capacity for passage of 



