•ga 



...khbl 



-:.■.... .y. 



-••v.m. 



B 



-...fH 



'•:.'^-''.."-'v.-- •■••.'• •■'.•■■•■'.•■.■ ^..''v'"-"V.-*Vv:!.?v.'V"v).";;;>' ■:..";•••.■'•. •..•.■-■ •;.l : '•"..• V]-* •;•;.■".•.•■ ': '•. .■*■:: 

 ••:.•::..• •.■:■..".■..• .•.■;•;■■■;..■ . ■* . ■.-■.•.. >.•:..•■• .•"■•'•■•vvv/.;|"::; .• : . ; •.•.•..•■■.•..•"... •■• •■ •.■••.'•;".■.••-"••= 



Fig. 3,.-Calli,rapha. A. Long^udinal section ^^^-^^ ^J^^^^^^ 

 biasbyana four hours after deposition. B. Longitudinal sec 

 through an egg of C. biosbyana 14 hours after deposition C.Jjo 

 germ cells just protruding from posterior end of egg of C.rnulH 

 fuZata D The pole-disc in an egg of C. mulhpunctata g.c.d - 

 pole dtc- gn. = germ nuclei fusing; khbl = keimhautblastem ; P - 

 posterior 'end of egg; pM.n. = preblastodermic nuclei; v.m. = vrtel- 

 Une membrane ; vt. = vitellophags ; y. = yolk. ^ 



