112 



Mr. E. A. Andrews on some 



minutes later. The double membrane is indicated by two 

 lines some distance from the egg. 



At this period the activities of the polar bodies have passed 

 through their first phases and are gradually approaching their 

 more permanent later phases. 



Fie-. 2. 



A more detailed account of these will be given elsewhere, 

 but we will here note that the polar bodies continue to adhere 

 to one another and to the egg for a long time, even if the 

 membrane be removed and they be exposed to the sea-water. 

 "Wlien the larva becomes ciliated the jjolar bodies break loose 

 and float about in the liquid between the larva and its mem- 

 branes ; but tiiey still adhere to one another and are some- 

 times seen attached to the egg-membrane. Probably they 

 are lost when the larva breaks out from the egg-membranes. 



The first and the second polar bodies are markedly 

 different : the first tends to remain more nearly spherical and 

 to continue its radiating Helioza-like activities ; the second 

 early assumes somewhat the shape of a spindle, and is prone 

 to send out long polar processes looking from the end view 

 like stars and strongly suggesting /ree astrospheres^ and from 

 the side view somewhat like test-tube brushes. In later 

 phases the spindle may be much elongated, slender, and with 



