DEVELOPMENT OF TAPE-WORMS. 



155 



through multiplication by division of the nucleus (germi- 

 native cell). In the eggs of Tcenia bacillaris E. Van Beneden 



Fig. 103. Tcenia solium. Nat. size, 

 with the head magnified. Strobila stage. 

 After Beneden. 



Fig. 104. Head and proglottisof 

 T. wtfiwm. After Benedeu. 



saw the nucleus subdivide ; after passing through a morula 

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



