DESCRIPTION OF PLATE l>. 



scends and becomes differentiated into the pseudoviun. 

 The rest remain dormant, are absorbed, or perhaps 

 they constitute the " Wanderelemente " of Dr. A. 

 Brandt. 295 diam. (Fide Brandt, ' Ueber das Ei,' 

 p. 51.) 



Fig. 6. — A germ extracted from its chamber and 

 treated with acetic acid. It has no pseudovitelline 

 membrane : v, clear vesicle, with its endoplast or 

 nucleus ; m, blastoderm ; //, pseudovitellus with 

 granules. After Huxley. 



