laimunni 

 Is.t. 3 .:b sal. gl. 



38 39 



Fi^.S. 





r 



Fio. Zc. floor of pericardium 



c ■ 



.^^ 



? 



.^^ 



? 



**^ 





/t^. /^. 



.^^ 



V 



( 



> 





Epidermis ^Pm "-^^cL 



crur.gl. 



opening of nephridium "\ 





circ. mus. 



