PLATE 1 ! 



EXPLANATIOX OF FIGURES 



Clava leptostyla 



All figures drawn with the aid of the camera lucida The niagnifieation indi- 

 cated is the initial magnification, the figures as they appear here have been 

 reduced to f original size. 



enti. — entoderm. All figures X 1700. 



1 Primitive egg cell in the ectoderm. 



2 Primitive egg cells migrating through the supporting layer into the ento- 

 derm, from the ectoderm. 



3 and 4 Primitive egg cells in the entoderm of the polyp. 



5 Growing egg cells in the entoderm of the pedicel of the gonophore. The 

 nuclear reticulum coarsely granular and- wide meshed. Chromatin emission 

 starting. 



94 



