VI 11 
Index. 
PAGE 
Willis, J. C. — The Evolution of Species in Ceylon, with reference to the Dying Out of Species. 
With two Figures in the Text ........... i 
The Distribution of Species in New Zealand. With a Diagram in the Text . 437 
Worsdell, W. C. — The Morphology of the Monocotyledonous Embryo and of that of the Grass 
in particular. With ten Figures in the Text ........ 509 
B. LIST OF ILLUSTRATIONS. 
a. Plates. 
Portrait of Professor D. T. G wynne- Vaughan. 
I. Pisum sativum (Leitch). 
II. Water cultures (Brenchley). 
III. Peranema cyatheoides, D. Don (Davie). 
IV. Planoxylon Hectori, nov. gen. et sp. (Slopes). 
V. Marah (A. W. Hill). 
VI. Statice (de Fraine). 
VII. Drimys (Jeffrey and Cole\ 
VIII. Hyalotheca dissiliens (Acton). 
IX. Colloidal Silica (Paine). 
X. Botrytis cinerea (Blackman and Welsford). 
XI. Characium Sieboldii, A. Br. (Smith). 
XII. Pediastrum Boryanum (Smith). 
XIII. Osmundaceae (Gwynne- Vaughan). 
XIV. Davallia and Ligodium (Gxvynne-Vaughan). 
XV. Pityostrobus macrocephalus (Dutt). 
b. Figures, i. Distribution in Ceylon of the earlier VR, R, and RR species from 
Trimen’s Flora (Willis) . . . . . . . .12 
2. Distribution diagram for the genus Doona (Willis) .... 14 
1, 2. Apparatus used in experiments on the influence of temperature on the 
rate of growth in Pisum sativum (Leitch) ..... 27 
3. Diagram showing relation of growth to temperature in graphical 
form (Leitch) .......... 28 
4, 5. Diagrams showing relation of growth to temperature in graphical 
form (Leitch) .......... 33 
6. Diagram showing relation of growth to temperature in graphical 
form (Leitch) 35 
7. Diagram showing relation of growth to temperature in graphical 
form (Leitch) 36 
8, 9. Diagrams showing relation of growth to temperature in graphical 
form (Leitch) . .3 7 
10. Growth curve, Krogh’s curve, and Kuijper’s curve compared (Leitch) 40 
1. Recording porometer (Laidlaw and Wright) .... 48 
2. Diagram showing result of experiment on Maranta coccinea (Laidlaw 
and Wright) 52 
3. Result of experiment on Phaseolus vulgaris (Laidlaw and Wright) 53 
1, 2. Effect upon the stomata of the continued passage of air. Begonia and 
Eucharis Mastersi (Knight) ... ..... 60 
3. Effect upon the stomata of fixing a porometer chamber. Eucharis 
Mastersi (Knight) ......... 62 
4. Diagram showing the form of double chamber used (Knight) . . 65 
5. Effect of the intercellular spaces of the leaf upon porometer readings 
(Knight) ... 67 
6. Behaviour of stomata of different portions of a leaf under similar condi- 
tions (Knight) 72 
7. Behaviour of stomata on different leaves under similar conditions 
; Knight) . 74 
1. Curve 1 (Brenchley) Si 
2. Curve 2 (Brenchley) 83 
3. Curve 3 (Brenchley) 84 
4. Curve 4 (Brenchley) ......... 86 
1. Longitudinal section of tip of stem of Hippuris vulgaris (Barratt) . 93 
