PLATE II. 



A COCKROACH (Periplaneta orientalis). 

 (From Rolleston.) 



antennae ; <5r, 2, 3, tibiae ; c, anal cerci ; d, ganglion on recurrent nerve upon the crop ; r, salivary 

 duct ; y, salivary bladder ; g, gizzard ; A, hepatic cosca ; /, chylific stomach ; j\ Malpighian 

 vessels : k, small intestine; /, large intestine ; w, rectum ; , first abdominal ganglion; o, ovary; 

 /, sebaceous glands. 



