112 



Mr. E. A. Andi-ews on some 



minutes later. The double membrane is indicated by two 

 lines some distance from the &gg. 



At this period the activities of the polar bodies have passed 

 through their first phases and are gradually approaching their 

 more permanent later phases. 



Fipr. 2. 





.i^A-^- 



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. 

 "When the larva becomes ciliated the polar bodies break loose 

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

 branes ; but they 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 



