NOTES AND ABSTKACTS. 



483 



paramount, but, takeu altogether, the quality of cotton produced is 

 good and finds a ready sale in the English market. This is especially 

 the case with St. Vincent cotton, which fetched several pence per lb. 

 ^ more than cotton grown in other islands. — C. H. L. 



Cotton Seed, Effect of Storagre on. By H. A. Tempany 



(Weist Indian Bull. vol. x. No. 2, pp. 121~124, 1909). — Storage alters 

 the chemical composition of the seed. It also deteriorates its ger- 

 minating power. — C. H. L. 



Cucumber Beetle, The Striped {Diahrotica vittata Fab.). By 

 F. H. Chittenden, Sc.D. {U.S.A. Dep. Agr., Bur. Entom., Circ. 31; 

 May 1909; 2 figs.). — A revised edition of previous circulars dealing 

 with the life-histor}^ food-plants, and methods of prevention and 

 destruction of this pest. — V. G.J. 



Cytolog-y, Toxic Solutions and. By W. V\^. Stockberger {Bot. 

 Gaz. vol. xhx. pp. 401-429 ; with 7 text figs. ; June 1910).— The author 

 has examined the effect of toxic solutions on mitosis. In this respect 

 distilled water seems to be itself a toxic solution. The osmotic action 

 of the solution used may produce abnormal results. Neither copper 

 sulphate, nor phenol, nor strychnine produced amitosis or binucleated 

 cells. The spindle fibres and achromatic structures are most sensitive 

 to toxic solutions. The author did not see the large fusion nuclei of 

 Nemec, nor did he find that doubling of the nucleolus preceded amitosis 

 (Wasielewski).— G. F. S.-E. 



Dahlias, Cactus and Pompon {Gard. Chwn. xlvii. (1910), p. 52; 

 Jan. 22). — A descriptive list of the best of the newer Cactus and Pompon 

 Dahlias is given. A distinction is made between those that are good 

 for exhibition and those that are useful for garden decoration. — F. J. C. 



Davidia involucrata. By S. Mottet {Le Jard., vol. xxiv. No. 552, 

 p. 52 ; Feb. 20, 1910). — The first flowering of this remarkable tree was 

 described in Le Jardin, 1906, No. 466, p. 216. Since that time it has 

 flowered regularly each year, and last October it was laden with over 

 a hundred fruits. Their character confirms the previous conclusion that 

 it belongs to the family Cornaceae. — F. A. W. 



Deutzia and Philadelphus, New Varieties. By C. Arranger 

 (Le Jard., vol. xxiv., No. 550 p. 24; Jan. 20, 1910; with 2 figs.).— 

 Deutzia crenata magnifica, hybrid from D. crenata, by fertilization of 

 var. candidissima plena with D. Vilmorinae. Absolutely hardy, free 

 growing, shoots bronze-green. Very free bloomer, with masses of large 

 full flowers, like minute roses, with pure white, regular petals. D. dis- 

 color elegantissima, produced by crossing D. scahra with D. discolor 

 purpurascens. An elegant plant, with long brown shoots, axillary 

 inflorescence in corymbs of fifteen to eighteen flowers, which are white 

 and pink, with pink buds. Flowers for a long time, the later blooms 

 being bright rose-coloured. 



