DEVELOPMENT OF TAPE-WORMS. 



through multiplication by division of the nucleus (germi- 

 native cell). In the eggs of Tcsnia lacillaris E. Van Beneden 



Fig. 73. Tcenia solium. Nat. size, 

 with the head magnified. Strobila stage. 

 -After Beneden. 



Fig. 74. Head and proglottisof 

 T. solium. After Beneden. 



saw the nucleus subdivide ; after passing through a morula 

 condition the cells are arranged in two layers, and the outer 



