10 University of California Publications in Zoology. Vol. 6 



However he indicates an increase in the weight of dry substance, 

 Table III. This may be explained by the fact that water taken 

 up in the metabolism of development is probably chemically 

 combined with the proteins, forming new chemical compounds 

 nl' greater weight. However, tin discrepancy between Pott's re- 

 sults and tliost In n n cordi <1 a rtainly m < ds furtht r < xperimental 

 < .rami nation. 



In conclusion, it is suggested that similar weighings of large 

 holoblastie eggs, as for example those of amphibians, where the 

 work done in cleavage must be considerable, might be especially 

 interesting could these be quantitatively compared with similar 

 weighings of eggs of rather closely related species but having 

 meroblastic cleavage. 



