1SOPODA. 



309 



FIG. 262. 



Fig. 260. Section of the embryo pilUbug. </, intestine; L epithelium form- 

 ing the walls of the two lobes of the liver ; g, transverse section of the nervous cord ; 

 A, walls of the body. After Bobretzky. 



Fisr. 261. Section of more advanced embryo pill-bug, h, heart ; hi), hypoder- 

 mal layer or body-walls ; m, muscular wall of the intestine ; e, epithelial lining of the 

 intestine ; ;>, dividing cell-wall between the heart and intestine ; /, two lobes of the 

 liver ; g, ganglion, the clear space being filled with the tine granular substance of the 

 ganglion. After Bobretzky. 



Fig. Zf&.Bopyrus. A, ventral, B, dorsal side of the female ; C, lateral and Z>, 

 dorsal view ot the male ; c 1 , head and first thoracic segment ; c 2 , antennae all en- 

 larged. Packard, del. 



