352 



THE ANATOMY OF INYERTEBRATED ANIMALS. 



Fig. 98. — Longitudinal and vertical section of a female Cockroach (Blatta). — 1 to xx, 

 somites of the hody ; 1 to 11. somites of the abdomeu ; A. antenna : lb. labium ; 

 a. mouth; b, oesophagus : c, crop ; d. proventricnlus : e. pyloric caeca : /. chyliflc 

 ventricle : g. insertion of the Malpighian caeca : h. intestine : i. rectum ; r, vulva ; 

 /. salivary trland : k. salivary receptacle. By an error, the duct is made to termi- 

 nate above instead of beneath the lingua. H. position of heart : m. cerebral gan- 

 glia ; .V, thoracic ganglia ; x. cerci. 



lingua, or hypopharynx^bohmd. The oesophagus, beginning 

 as a narrow tube, passes between the anterior crura of the 

 tentorium, and then, leaving the head by the occipital foramen 



Fig. 99.— Longitudinal and vertical section of the abdomen of a male Cockroach 

 {Blatta). — 1. 2. 3. 4. etc.. terga and sterna of the abdomen ; t. mushroom-shaped 

 gland ; v. aperture of the vas deferens ; A. anus. 



and traversing the neck and thorax, gradually widens into 

 the large crop or ingluvies (Fig. 98, c), which lies in the ab- 

 domen. This is followed by the small thick-walled proven- 

 triculus (Fig. 98, d), shaped like a pear, with its broad end 

 applied against the crop. The narrow end of the proventricu- 

 lus opens into a wide canal, the so-called chylific ventricle or 



