Vlll 
Index. 
PAGE 
Scott, D. H. — On the Structure and Affinities of Fossil Plants from the Palaeozoic Rocks. 
V. On a new Type of Sphenophyllaceous Cone (Sphenophyllum fertile) from the 
Lower Coal-measures. (Abstract.) . . . 168 
Stevens, W. C. — Spore Formation in Botrychium virginianum. With Plates XXVIII-XXX 465 
Stopes, Miss Marie C. — On the Double Nature of the Cycadean Integument . . . 561 
Tansley, A. G., and Lulham, Miss R. B. J. — A Study of the Vascular System of Matonia 
pectinata. With Plates XXXI-XXXIII, and five Figures in the Text . . . 475 
Thompson, H. S. — On Phlomis lunarifolia, Sibth. et Smith, and some species confused 
with it 439 
Vines, S. H. — The Proteases of Plants. II 149 
The Proteases of Plants. Ill „ . .171 
Ward, H. M. — Recent Researches on the Parasitism of Fungi 1 
Williams, J. Lloyd. — Studies in the Dictyotaceae. III. The Periodicity of the Sexual Cells 
in Dictyota dichotoma. With six Diagrams in the Text 531 
a . Plates. 
I, II. 
Ill, IV. 
V. 
VI-IX. 
X. 
XI, XII. 
XIII. 
XIV-XVII. 
XVIII-XX. 
XXI, XXII. 
XXI 1 I-XXV. 
XXVI, XXVII. 
XXVIII-XXX. 
XXXI-XXXIII. 
B. LIST OF ILLUSTRATIONS. 
Relation of Root to Stem in Calamites (Maslen). 
Arceuthobium occidentale, Engl. (Peirce). 
Zea Ma'is (Sargant and Robertson). 
Lilium (Allen). 
Archangiopteris and Kaulfussia (G WYNNE- Vaughan). 
Spencerites (Berrjdge). 
Indigo-yielding Plants (Leake). 
Araceae (Campbell). 
Vascular Strands of Ferns (Chandler). 
Cyathodium (Lang). 
Lentinus lepideus (Buller). 
Embryology of Dicotyledons (Mottier). 
Botrychium virginianum (Stevens). 
Matonia pectinata (Tansley and Lulham). 
b . Figures. 
1. 
2, 3> 4- 
5> 6. 
7 - 
8-10. 
11-15. 
16. 
* 7 « 
Transverse section of a Stem of Calamites (Maslen) 
Spencerites insignis (Berridge) 
Optima and Limiting Factors (F. F. Blackman) 
Binucleate cells (Massee) 
Wood Vessels (Ewart) 
Matonia pectinata (Tansley and Lulham) 
Gas generator (Andrews) . . . . 
Fertilization in Sphaerotheca (V. H. Blackman and Fraser) 
2 74 ) 
494, 499, 501, 505, 
• 65 
275, 276 
284, 291 
• 3 2 5 
• 443 
507 
5 2 4 
568 
c . Diagrams. 
I- VI. Dictyota (Williams) 
558-560 
