CONTENTS 
PAGE 
Ganong, W. F. — Contributions to a Knowledge of the Cactaceae : 
II. The Comparative Morphology of the Embryos and Seedlings. 
(With Plate XXVI) 
Pearson, H. H. W. — Anatomy of the Seedling of Bowenia spectabilis. 
(With Plates XXVII and XXVIII) 
Green, J. R.— The Alcohol-producing Enzyme of Yeast 
Wager, H. — The Nucleus of the Yeast-Plant. (With Plates XXIX 
and XXX) 
Vines, S. H. — The Proteolytic Enzyme of Nepenthes, II . 
NOTES. 
Burkill, I. H.— Changes in the Sex of Willows 
Jones, C. E. — Anatomy of the Stem of Species of Lycopodium . 
Williams, J. Lloyd. — Reproduction in Dictyota dichotoma 
Huie, L. H. — Changes in the Gland-Cells of Drosera produced by 
various Food-materials 
Ward, H. M. — A Potato-disease 
Penicillium as a Wood-destroying Fungus . 
Ellis, W. G. P.— A Method of obtaining Material for illustrating 
Smut in Barley 
Errera,, L. — Structure of the Yeast-cell 
Osmotic Optimum and Measurements 
Phillips, R. W. — The Form of the Protoplasmic Body in certain 
Florideae . 
Klebs, G. — Alternation of Generations in the Thallophytes 
Lang, W. H. — Alternation of Generations in the Archegoniatae . 
Hartog, M. — Alternation of Generations 
423 
475 
491 
499 
545 
557 
558 
559 
560 
561 
565 
566 
567 
568 
569 
570 
583 
593 
CONTENTS AND INDEX 
Hooker, Sir J. D. — Biographical Memoir of George 
■ (With Portrait) ..... 
Bentham 
i-viii 
ix-xxx 
NOTICE TO SUBSCRIBERS. 
The subscription-price of each volume is thirty shillings, payable in 
advance : the Parts, four in number, are supplied as they appear, post free 
to subscribers in the United Kingdom, and with a charge of is. 6d. per 
annum for postage to subscribers residing abroad. The price of individual 
Parts is fixed at a higher rate. Intending subscribers should send their 
names, with subscription, to Henry Frowde, Oxford University Press Ware- 
house, Amen Corner, London, E.C. 
\ 
NOTICE TO CONTRIBUTORS. 
Contributors in America should address their communications to Professor 
Farlow, Harvard University; and all other contributors, to the Editors, 
at the Clarendon Press, Oxford. 
Papers sent in with a view to publication must be type-written ; and the 
illustrative figures should be planned so as to properly fill a 4 to or an 
8vo plate. Attention to this will conduce to the rapid publication of the 
papers if accepted. 
Each contributor to the Annals of Botany is entitled to receive gratis 
twenty-five separate copies of his paper, and may purchase additional copies 
if he informs the Editors of his wishes in this respect when he returns 
corrected proofs. The price of these additional copies will depend upon 
the amount of text and the number of plates in the paper. 
