193 



L.M.B.C. MEMOIRS 



No. X. PATELLA. 



BY 



Professor -J. ~R. Ainsworth Davis, 



AND 



II. J. Flbube, B.Sc. 



Contents 



PAGE 



Preface 193 



General Description 195 



External Characters 198 



Body Wall, Muscular System, 



Mantle, etc 206 



Digestive Organs 212 



Nervous System, Sense Organs 228 



PAGE 



Circulatory Organs and Coelom 238 



Respiratory Organs 245 



Excretory Organs 248 



Reproductive Organs 250 



Development 252 



Conclusions 255 



Explanation of the Plates 261 



Preface. 



The chief objects of this Memoir are : — 



(1) To provide a reliable account of the anatomy of 

 Patella vulgata. 



(2) To treat the subject matter so as to show the place 

 among Gastropods which this type occupies. 



The work has been carried out in the Zoological 

 Laboratory of the University College of Wales ; and do 

 facts are included that we have been unable to personally 

 R 



