Experimental studies on germinal localization

Abstract

Preliminary Observations on the unsegmented Egg and the normal Effect of removing the Polar Lobe. DeveIoprncnt. ( a ) General history of the loheless Embryo, with a Coinparison of (b) The Mesoblast Question. Region. ( a ) Development of Fragments obtained by horizontal or oblique Sec-(b) Development of Fragments after vertical Section. isolated Polar Lobe. isolated Blastomeres. Localization of the apical Organ, and its Correlation with the post-trochal Localization in the unsegmented Egg. tion. Observations on enucleated Fragments of fertilized Eggs and on the Comment. Summary. INTRODUCTION.