104 ILUNOIS BIOLOGICAL MONOGRAPHS fjjl 



EXPLANATION OF PLATE 



Gordius robustus 



Fig. 109. — ^Young female; cross section near posterior end; early stages of oviducts, seminal 



receptacle, and cloacal gland; X 250. 

 Fig. 110.— Section slightly posterior to that of Fig. 109; X 250. 

 Fig. 111. — Section thru posterior end of cloacal gland of same female; X 250. 

 Fig. 112. — Development of cuticula and muscles; slightiy later stage than Fig. 85; X 720. 

 Fig. 113. — Cross section thru posterior region of female showing mass of spermatozoa adhering 



to outside; X 60. 

 Fig. 114. — Cross section of nerve cord of adult; X 530. 



