JSS Dearborn, A Laboratory-Course in Physiology Based on Daphnia etc. 



C. The digestive glands and their rhythmic movements. 

 U. Peristalsis. 



E. Speed of the antiperistaltic wave. 



F. Frequency of the antiperistaltic waves. 



G. Defecation. 

 H. Catharsis. 



I. Correlation in the Alimentary canal. 



X. Blood: Daphnia. (Compare Hydra and Man.) 



A. Number and size of the amebocyte-corpuscles. 



B. Shapes and intrinsic movements of the corpuscles. 



C. Change of color on exposure to air. 



XL Circulation: Daphnia. 



A. The heart. Systole and diastole. 



B. The average heart-rate. 



C. The effects of varying temperature on the rate. 



D. The heart's extreme persistence. 



E. The blood-sinusses. Osmosis. 



F. The effects of electricity on the heart. 



G. The. effects of blood-salines on the heart; osmosis. 

 H. The effects of certain other drugs on the heart, 



I. Correlation with extrinsic conditions. 



J. The embryonic heart-rate: why slower than the 



maternal heart-rate? Myogenesis vs. Neurogenesis. 

 K. The cardio-inhibitory center. 



XII. Respiration: Daphnia. 



A. Direct respiration. 



B. Structure of the gill-feet. 



C. Rhythmic movements of the gill-feet. 



D. Apnea? 



E. Effects of carbon dioxide in excess. 



F. Effects of a larck of oxygen. 



G. Effects of carbon monoxide. 

 H. Hemocyanin in solution. 



XIII. Muscle and Muscle-Action: Daphnia. 



A. Smooth muscle of the alimentary canal. 



B. The eye-muscles. Convulsive action. 



C. Voluntary muscle of antennae, etc. Fatigue. 



D. Cardiac muscle. Tonus. Action of the ions in the 

 various blood-salines. Absence of obvious fatigue. 



XIV. The Nervous System: Daphnia. 



A. Brain and optic lobe. 



B. Moto-sensory circuit: Retzius' work. 



C. Augmentory action: heart. 



/ 



D. Inhibitory action: heart. 



