183 



L.M.B.C. MEMOIRS 



No. XXIV. APLYSIA 



BY 



NELLIE B. EALES, B.Sc. 



LECTURER IN ZOOLOGY, UNIVERSITY COLLEGE, READING. 



CONTENTS. 







PAGE 



Introduction ... 







... 184 



History 







... 185 



Habitat 







... 190 



Food 







... 191 



Life-History ... 







... 191 



Enemies 







... 193 



Fossil Remains 







... 193 



External Characters ... 







... 194 



The Shell 







... 202 



Histology of the Foot and its Glands 





... 203 



Histology and Physiology of the Mantle Glands 





... 205 



The Digestive System 





... 20G 



Glands of the Gut 







... 213 



Mechanism of Digestion 







... 214 



Blood Vascular System 







215 



Respiratory System 







... 225 



Excretory System 







... 225 



Muscular System 







... 228 



Nervous System 







229 



Sense Organs 







... 238 



Generative System 







241 



Literature 







... 255 



Explanation of the Plates 







... 260 



M 



