78 ILUNOIS BIOLOGICAL MONOGRAPHS [198 



EXPLANATION OF PLATE 

 Photomickogpaphs or Mounxs 



Fig. 1. — Paragordius varius, tangential section of fibrous cuticula of adult; shows fibres, ends 



of radiating strands, and cross formed by the passage thru the cuticula of a large strand 



to a tubercle; X 800. 

 Fig. 2. — P. varius, longitudinal section of young female; shows that buds of ovaries are not 



opposite; X 50. 

 Fig. 3. — P. varius, longitudinal section thru anterior end of adult, showing large parenchynm 



cells; X 100. 

 Fig. 4. — Gordius robustus, thin layer of fibrous cuticula of adult after maceration with nitric 



acid; X 1240. 

 Fig. 5. — Same as Fig. 4; X 175. 

 Fig. 6. — P. varius, longitudinal section perpendicular to surface of muscle cells of adult; shows 



elongated condition of cells and nuclei; X 150. 

 Fig. 7. — P. varius, tangential section thru wall of cloaca, showing pores; X 475. 



