CLKAVA(4E OF LEPIDOSIUKN 503 



(lional furrow as secui on the right side of tli(^ figure. Before 

 this furrow has progressed very far another furrow * (Text- 

 fig. 8, a) ^ grows down from it towards the abapical pole 

 bisecting the quadrant ; on the other side of that same 

 meridional furrow there is an indication (Df a similar latitudinal 

 furrow (* *). 



The third specimen showed practically the same arrangement 

 and development of furrows as the egg shown in fig. 5 of 

 Professor Kerr's ' Philosophical Transactions ' paper. One 



Text-fig. 8. 



a. Apical view. h. Abapical view. 



meridional furrow is rather displaced, and one of the furrows 

 of the third set growing from it is definitely latitudinal (Text- 

 fig. 9, right lower quadrant). 



To quote one more example illustrative of irregularity of 

 segmentation : in the egg represented in Text-fig. 10 one of 

 the two primary meridional furrows (the one which is horizontal 

 in the figure) is perfectly normal but the other shows a distinct 

 break at the apical pole, the portion next the apical pole in one 

 hemisphere (that which is above in Text-fig. 10) having under- 

 gone a distinct displacement. As seen in the figure the amount 

 of this displacement increases as the apical pole is approached. 



^ Which is however in this case uncomplicated by any branching or 

 distortion. 



