i S o 



MANUAL OF ZOOLOGY 



bodies, the penial seta (p/i. s). In the female the repro- 

 ductive aperture or gonopore is separated from the anus, and 



- <*> a 



6"w 



o •' 



* 3 M 



c rt u 



<u ,. w 



.2 1.2 



S 5 

 c > a 



w « ^ 

 "2- fl 



«°s. 



TO c « 



M U ft" 



I 8; 



is situated on the ventral surface about one-third of the 

 length of the body from the anterior end (Fig. 82, gnp). 



The outer surface of the body is furnished by a delicate, 

 transparent, elastic membrane, of a chitinoid nature, the 



