U - 

 can be iven, 



.sure of the cells 



^shell causi - - - blast to be d 1 ' . ?hus 



the s -on cavity has be -lis 



-•re scatti . . receding. The cells 



t-.vo's , t r r s ,;. four's.. peri- 



. t has several nuclei in t. .tion. There 



is a well def 'mic stratum", as 1 .isb 



writers t« • layer of cells. 



. 79 represents the this, s 



need detain us but for a f€ ts. Its outer cells are 



and unequal in size, a interior cells are 



the largest of all. T3 - last is ver; thick, y< 



and i from belov/ by large vacuoles. On the left 



. cut out of t] 



a cell in 'iblast, while in the center cells 



. 



This blastoderm is closely related to that illustra 



section by "- . 



Pi . " is a horizontal sectio. . ich blasto- 



vert . 

 derm as that shown infection - ig.78, -. . It shows 



the loose of the interior cells, am - a,wn- 



out cells of the Peckschicht . , :en at sev 



