DEVELOPMENT OF TAPE-WORMS. 



113 



through multiplication by division of the nucleus (germi- 

 aative cell). In the eggs of Tcvnia lacillaris E. Van Beneden 



Fig. 73. Tcenia solium. Nat. size, 

 with the head magnified. Strobila stage. 

 After Beneden. 



Fig. 74. Head and proglottisof 

 T. xolium. After Beneden. 



saw the nucleus subdivide ; after passing through a morula 

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



