10 



oup'^tlv a flattened p.nr^parnce as Boen i^i tho fif^urr iust men- 

 ticned. 



In this staR'^ -nroto^las-^ic filps or bridge?, also, 

 frequertly exist for a tirr^e after the seg^entatior is practi- 

 cally complete. They finally are absorbed by the blasto- 



ce 

 'Teres v/hich rcmd ur> for-ing the co-rleted four-j^lled "tage 



A 



as shown i-i Figure 8. 



The third cleavage r>lane is equatorial and divides the 

 egg irto eight ecual blastOTeres ; four of which are situated 

 at the ufner riole and four at the Icvrer role of the e^!? as 

 seen in Figure P. This is the condition when the c ^ ndit ix s p- 

 is regular, and rnirht be described r.c two four-celled stages 

 of half size sunerir^osed one unor the other, an'^ ' then the 

 uooer set rotated to the left. V/hile the fcr^^aticn of the 

 eight-celled stage was always nearly the sa^-e in the eggs 

 that I followed, after the divisio-^ was comnleted, the 

 blasto^eres did not always retain the s-'ttc relative posit- 

 ions Sometires there occured a senaration of the cells at 

 one sidr of the eouatorial furrow and the blastcreres rolled 



