CONTENTS 
No. XLIX, March, 1899. 
page 
MacdougaL, D. T. — Symbiotic Saprophytism. (With Plates land It, 
and one Figure in the text) ....... 1 
Newcombe, F. C.— Cellulose- Enzymes 49 
Sturch, H. H. — Harveyella mirabilis. (With Plates III and IV) . 83 
Salmon, E. S. — On the Genus Fissidens. (With Plates V-VII) . T03 
Trow, A. H. — Observations on the Biology and Cytology of a new 
variety of Achlya americana. (With Plates VIII-X) . . 13! 
NOTES. 
BurkilL, I. H. — On Pelargonium rapaceum, Jacq. . . . . 1 8 1 
Scott, D. H. — On Medullosa anglica : a new Representative of the 
Cycadofilices . . . . . . . . .183 
Williams, J. Lloyd. — New Fucus Hybrids . . . . ,187 
No. L, June, 1899, 
Snow, M iss J. W. — Pseudo-Pleurococcus, Nov. gen. (With Plate 
XI) 189 
Ward, H. Marshall. — Thames Bacteria, III. (With Plates XII- 
XIV) 197 
Darbishire, O. V. — On Actinococcus and Phyllophora. (With Plate 
XV, and seven Figures in the text) ..... 253 
Dixon, H. H. — The Possible Function of the Nucleolus in Heredity . 269 
Lang, W. H. — The Proth alius of Lycopodium clavatum, L. (With 
Plates XVI and XVII) . . . . . . . 279 
NOTES. 
Seward, A. C. — The Structure and Affinities of Matonia pectinata . 319 
Bower, F. O. — Studies in the Morphology of Spore-producing 
Members : IV. Leptosporangiate Ferns .... 320 
No. LI, September, 1899. 
Mottier, D. M. — The Effect of Centrifugal Force upon the Cell. (With 
Plate XVIII) 325 
Biffen, R, H,— A FaGDestroying Fungus, (With Plate XIX) , 363 
