x CONTENTS. 
CHAPTER X. 
ON THE SENSITIVENESS OF THE LEAVES, AND ON THE LINES OF 
TRANSMISSION OF THE MOTOR IMPULSE. 
Giands and summits of the tentacles alone sensitive—Transmission of 
the motor impulse down the pedicels of the tentacles, and across 
the blade of the leaf—Aggregation of the protoplasm, a reflex 
action—First discharge of the. motor impulse sudden—Direction 
of the movements of the tentacles—Motor impulse transmitted 
through the cellular tissue—Mechanism of the movements—Nature 
of the motor impulse—Re-expansion of the tentacles Pages 
187-211 
CHAPTER XI. 
RECAPITULATION OF THE CHIEF OBSERVATIONS ON DROSERA 
ROTUNDIFOLIA n a o a ee eS 
CHAPTER XII. 
ON THE STRUCTURE AND MOVEMENTS OF SOME OTHER SPECIES OF 
DROSERA. 
Drosera anglica — Drosera intermedia — Drosera capensis — Drosera 
spathulata — Drosera filiformis — Drosera binata — Concluding 
remarks.. pe ees E ae Oe E ee e A 
CHAPTER XIII. 
DIONÆA MUSCIPULA. 
Structure of the leaves—Sensitiveness of the filaments—Rapid move- 
ment of the lobes caused by irritation of the filaments—Glands, 
their power of secretion—Slow movement caused by the absorption 
of animal matter—Evidence of absorption from the aggregated 
condition of the glands—Digestive power of the secretion—Action 
of chloroform, ether, and hydrocyanic acid—The manner in which 
insects are captured—Use of the marginal spikes—Kinds of insects 
captured—The transmission of the motor impulse and mechanism 
of the movements—Re-expansion of the lobes.. ..  ., 231-259 
CHAPTER XIV. 
ALDROVANDA VESICULOSA. 
Captures crustaceans—Structure of the leaves in comparison with 
those of Dionawa—Absorption by the glands, by the quadrifid 
