VoLuvie XV. 



November, iSgS. 



Number 2. 



JOURNAL 



MORPHOLOGY. 



THE OVARIAN EGG OF LIMULUS. 



A CONTRIBUTIO.y TO THE PROBLEM OF THE CENTRO- 

 SOME AND YOLK-NUCLEUS. 



JOHN P. MUNSON. « 



TABLE OF CONTENTS. 



Introduction, Material, Metliods, 



etc 113 



Oecology 1 16 



The Ovary 122 



Position and General Appear- 

 ance 122 



Muscle Coats 125 



Peritoneal Coat 127 



The Lining Epithelium 127 



Formation of Follicles 130 



Development of the Ovary 132 



The Egg 135 



Relation of the Egg to the 



Ovary 138 



Stages of Growth 146 



Stage 1 146 



Stage II 147 



Stage III 148 



Stage IV 148 



Degenerative Processes 149 



The Germinal Vesicle 152 



PAGU 



The Nucleolus 156 



a. Summary 162 



b. Literature 164 



Connection of the Egg with the 



Ovarian Tube 165 



The Cytoplasm 166 



The Yolk 166 



Polarity of the Egg 169 



Peripheral Bodies and Yolk-Nu- 

 clei 171 



The Egg Membrane 172 



Zones and Yolk-Nucleus 176 



The Centrosome and Sphere (Vitel- 



line-body) 183 



Interpretation and Summary igr 



Origin of the Sphere (Vitelline- 



body) 192 



Homology 195 



Position 197 



Nature of Metaplasm 199 



Growth of Cytoplasm 200 



