MEMOIRS OP THE NATIONAL ACADEMY OF SCIENCES. 435 



4S SO 



A 



Abp. EA. 



FUi. g. C'urve showing distribution of all nuclei, exclusive of primary yolk nm-loi, in tlie same egg as represented by Figs. anil 7. 

 (See Table i, In valuation stage, II, a.) A, Anterior; P, Posterior; Abp, Ventral plate; KJi, Embryonic area. 



6p. f/1. 



Fie;. Hi. Curve showing distribution of all nuclei, exclusive of primary yolk nuclei, iu the same egg as represented by Fig. 9. (See u, 

 '. Table i, and compare with Fig. 8.) A, Anterior; P, Posterior; Abp, Ventral plate; EA. Embryonic area, 



