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Show LON.DON: PRINTED BY WILLIAl\1 CLOWES AND SONS, LIMITED, 8T..L!IFORD STREET Alo:D CHARJNG CROSS. CONTENTS. fNTRODUCTION • Page 1-7 CITAPTER I. IIADITS OF WORMS. Nature of the sites inhabited-Can live long under water-Nocturnal-Wander about at night-Often He close to the mouths of their burrows, and are thus destroyed in large numbers by birds-Structure -Do not po sess eyes, but can distjnguish between light and darkness-Retreat rapidly when brightly illuminated, not by a reflex actjon-Power of attetttion- Sensitivo to heat and col<l- Completoly deaf -Sensitive to vibrations and to touch-Feeble power of smell-Taste- Mental qualitie~:;-Nature of food-Omnivorous-Digestion- Loaves before being swallowed, moistened with a fluid of the nature of the pancreatic secretion- Extra-stomachal digestion-Calciferous glands, structure of- Calcareous concretions formed in the anterior pair of glands-Tho calcareous matter primarily an excretion, but secondarily servos to neutralise the acids generated during the digestive process 8-54 UNIVFRS,TY OF l ITAH l \RRAR\ES |