• 



PLATES. 



• 



PLATE I. 



Fig. 1. Selaginclla soy ens. 



Portion of inferior surface and margin of leaflet, showing stronc 



rigid marginal frama 5 ' 



on 



x 31C# 



x IfiO 



- 



porous 



Fig. 2. Ditto ditto. Under surface of leaflet ; central porti _ 



Fig. 3. Ditto ditto. Upper surface of leaflet; stained with vJsuvin'; showing 



character of cells • ••♦.« 



Fig. 4. Ditto dm. Superior surface of leaflet ; morning . 



Fig. 5. Ditto ditto. Ditto ditto; after sundown 



Fig. 6. Ditto ddto. Ditto ditto; ditto 



Fig. 7. Ditto ditto. Ditto ditto; midnight . ] ] [ [ ] [ \ \ \ * [^ 



Fig. 8. Ditto ditto. Ditto ditto ; after exposure in a chamber contai # 



x 310 

 x 3lo 

 x 310 



ning 

 sulphuric acid and chloroform 



Fig. 9. Ditto ditto. Superior surface of leaflet ; morning 



Fig. 10. Ditto ditto. Ditto ditto ; after sundown 



Fig. 11. JUimosa pudica. Position of a young, immobile leaf at an early stage of development ; 



natural size. 

 Fig. 12. Ditto ditto. Position of a somewhat more mature, immobile leaf; natural size. 

 Fig. 13. Pithecolobium saman. Extremity of a growing axis ; showing positions of youn 



x 310 

 x 660 

 x 660 



immobile leaves. 



tr 



Fig. 14. Ditto ditto. Primary pulvini of leaves of various ages on an axis ; natural size. 



fr 



Fig. 15. Ditto ditto* Vertical sections of primary pulvini of various ages; showin 



gradual development of superior parenchyma; natural size. 



Fig. 16. Ditto ditto. Tertiary pulvinus of a young, immobile pinnule ; longitudinal, 



vertical section ...... 9 



Fig. 17. Ditto ditto. Tertiary pulvinus of a mature, freely mobile pinnule ; Ion 



tudiual, vertical section ••••.. 



Fig. 18. Mimosa pudica. Position of a young leaf just before the onset of nyctitropic move- 



x 50 



gi- 



x 50 



roents. 



Fig. 19. Cassia alata. Secondary pulvinus; vertical section; showing the disposition of the 



opposing masses of pulvinar parenchyma. 



^ 



PLATE II. 



Fig. 1. Cassia alata ; diurnal position of pinnae ; from a photograph. 



Fig. 2. Ditto ; nocturnal position of pinnae ; from a photograph. 



Pig. 3. Ditto; veitical,' transverse section of basal portion of secondary pulvinus; natural 



colours. 



Kg. 4. Ditto ; diagram of the base of the outer half of a pinna attached to its rachis 



viewed from the under surface; showing laruinar expansion 

 of puivinus. 



Pig. 5. Ditto ; pulvinus and base of the lamina of a pinna viewed from the under surface 



with the keel of the mid-rib and pulvinus removed ; showing 

 the expansion of pulviuar tissue over the base of the outer 

 half of the lamiua 



x 10 



Ank. Boy. Box. Gaud. Calcutta Vol. VI. 



