502 A. E. MILLER 



the apical pole: are for the most part obhterated, although the 

 fact that down at the al)apical pole the two meridional furrows 

 quite visibly intersect indicates that the egg belongs to this 

 stage. 



Stages 4-5 . — Altogether six eggs were found to be 

 approximately at this stage, and five gave evidence of further 

 irregularities in development. One which l)elongs to the 

 beginning of this period (Text-fig. 7) showed, again, lack of 

 continuity of one of the primary meridional furrows in the 

 region of the apical pole. Two secondary furrows arising 



Text-fkj. 6. Text-fig. 7. 



Apical view. Apical view. 



from the same meridional furrow (see upper half of Text-fig. 7) 

 proceed in a latitudinal direction and reach the other meri- 

 dional furrow, Avhile of the corresponding furrows of the opposite 

 side one is actually vertical in direction (see left-hand furrow 

 in lowTr half of Text-tig. 7), and the other, assuming a rather 

 latitudinal direction, runs into the meridional furrow of that 

 side. 



A second egg similar to the one already described showed 

 again the discontinuity of the meridional furrows ; neither 

 at the apical nor the abapical poles is there any sign of inter- 

 section. Vertical furrows appear in one-half of the egg (lower 

 half of Text-fig. 8, a), and in the other (upper half in Text- 

 fig. 8, n) a short latitudinal groove grows out from the meri- 



