510 



RAYMOND rEAHL. 



i. Crawliii£^ Movement .... 



1. Direction . . . . . 



2. Sfimuli which induce Crawlin;^ . 



c. Movement on the Surface Film 



d. Relation of the Movements of Tiichub to those of other 



Forms 

 TI. Non-locomotor Movements 



a. Contraction of tiie Body . 



b. Extension of llie Body 



c. Hest .... 



1. F'ormation of Collections 



d. The Effect of Operations on Movement 

 F. TJeactions to Stimuli 



T. Reactions to Mechanical Stimuli . 

 a. Methods 

 h. Description of Reactions . 



1. Reactions to Stimuli apjjlied to tlie Head Region 



a. Reactions to Strong Stimuli 

 j8. Reactions to Weak Stimuli 



2. Reactions to Stimuli applied to the Middle Region of 



the Body . . . . 



a. Reactions to Strong Stimuli 

 j8. Reactions to Weak Stimuli 



3. Reactions to Stimuli applied to the Posterior Region 



of the Body . . . . 



4. Reactions to Stimulation of the Ventral Surface 



5. Reactions of Resting Specimens to Moohanical 



Stimuli . . . . 



0. Reactions to Stimuli given hy Operative Proce- 



dure . . . . . 



7. The Effect of Mechanical Hindrance to Movement . 



c. The General Features of the Reactions to Mechanical 



Stimuli . . . . . 



d. The Mcclianism of the Reactions 



1. The Relation of the Brain to the Reactions 



2. The Neuro-muscular INleehanism 



e. Features in the General Pxhaviour of the Organism which 



the Reactions to Mechanical Stimuli explain 

 /. Sumniary . . . . . 



II. Reactions to Food and Chemical Stimuli . 



0. Food Reactions . . . . . 



1. Food Reactions of Specimens alter Operations 



2. Summary of Food Iteactions 



PAGE 



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