MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



435 



Abp. EA. 



rii). 8— Curve sbowiug distribiition of all niiilei, exclnaive of priTuary yolk nurlei, in the same egg as representpd by Figs. « ami 1 

 (Sic Table I, Invagination stagf, 11, a.) A, Auteriiir; 1'. Posteriur; Abp, Vinlral jilati-i iv'A, Jimbryouic area. 



Abp. EA. 



I'lii. Ill— I urvf sbowiug distribution of all nuclei, excluaivc of primary yolk nuclei, in the same egg as rtprescntod by Fig. 9. (See u, 

 e>, Table I, and compare with Fig. 8.) ,i,AuttTior; P.rostorior; 46;;, Ventral plalc 1 £ J., Embryonic area. 



