Volume VIII. May, 1S93. Number 2. 



JOURNAL 



OF 



MORPHOLOGY. 



THE EMBRYOLOGY OF LIMULUS. — PART 11. 



J, S. KINGSLEY. 



CONTENTS. 



Page 



Introduction ^9^ 



The Mesoderm and its Derivatives 196 



CCELOM ^97 



Comparisons 200 



Nephridia 203 



Comparisons 206 



Muscles 208 



Entosternite 209 



Organs of Circulation 209 



Comparisons 212 



The Alimentary Canal 214 



Mesenteron 214 



Stomod^um 217 



PROCTODiEUM 219 



Comparisons 219 



The Nervous System 222 



The Respiratory Organs 222 



Comparisons 225 



The Relationships of Limulus 227 



The Classification of the Arthropoda 247 



Bibliography 255 



Explanation of Plates 260 



19s 



