PA RASITK ' rVPEPODS—CA LirilD.E— WILSON. 



511 



genital segment, contracts as it enters the al)domen, enlarges in the 

 abdomen, and contracts finally to form a short rectum in front of the 



anus. The lattei is terminal and situated be- 

 tween the anal lamin;e (fig. IS). 



At the anterior end where it leaves the 

 stomach the intestine is on the ventral sur- 



sbg.- 



FUi. 1 7.— LONGITXIDINAL SECTION 

 (IK LEI'EdPHTHEIEUS SHOWING 

 RELATION OF INTERNAL OR- 

 GANS. (After A. Scott.) a, 

 anus; b. s., BLOOD space; c, 



FILAMENT DUCT; C. g., FILA- 

 MENT gland; d, DUCT of di- 

 gestive gland; e, eye; i, intes- 

 tine; m, mouth; ml., muscle; 

 n, ventral nerve; o, ovary; 

 oe., (ESOPHAGUS; r, rectum; 



Sbg., • SUBCESOPHAGEAL gan- 

 glion; spg.,SUPRACESOPHAGEAL 

 ganglion; St., STOMACH. 



Fig. 18.— The digestive system of Caligus 

 rapax; chalimus fully grown, g g, di- 

 GESTIVE glands; i, intestine; o, ovary; 

 r, rectum; s, stomach. 



face and it remains there till it passes into the g'enital seg'ment. 

 Here it lies close to the dorsal surface and remains there until after 

 it enters the abdomen, where it turns downward and occupies the center 

 of the body. 



In transverse sections of young males and females the stomach and 



