tis,m5 ^'?=^isi 



FIG. 36. Calligrapha. A. Longitudinal section through an egg of C. 

 bigsbyana four hours after deposition. B. Longitudinal section 

 through an egg of C. bigsbyana 14 hours after deposition. C. Two 

 germ cells just protruding from posterior end of egg of C. multi- 

 punctata. D. The pole-disc in an egg of C. multipunctata. g.c.d. = 

 pole-disc ; g.n. = germ nuclei fusing ; khbl = keimhautblastem ; p. = 

 posterior end of egg ; p.bl.n. = preblastodermic nuclei ; v.m. = vitel- 

 line membrane ; vt. = vitellophags ; y. = yolk. (114) 



