368 BENEDICT. 



Fig. 15. Longitudinal dorsal excretory vessels, x 25. 



Fig. 16. Transverse section near posterior end of proglottis. X 50. 



Fig. 17. Course of vas deferens and cirrus within the cirrus sac. Reconstruc- 

 tion from camera outlines. X 250. 



Fig. 18. Frontal section through cirrus pouch and vaginal opening, x 100. 



Fig. 19. Transverse section through vaginal sphincter, x 200. Not a camera 

 drawing. 



Fig. 20. Transverse section of vas deferens at its distal end. x 1000. Not a 

 camera drawing. 



Figs. 21-35. Proteocephalus filicollis. 



Fig. 21. Outline of short form of P. filicollis. X 4. 



Fig. 22. Outline of long form of P. filicollis. x 4. 



Fig. 23. Transverse section of proglottis through ovarial region, x 100. 



Fig. 24. Lateral view of scolex. x 200. 



Fig. 25. Transverse section of scolex showing nerve ring, x 200. Not a 

 camera drawing. 



Fig. 26. Median frontal section of scolex showing nerve trunks. X 200. Not 

 a camera drawing. 



Fig. 27. Reconstruction of frontal section showing anatomy. Camera outlines. 

 X75. 



Fig. 28. Female sexual organs of the intra-ovarial space. X 225. 



Fig. 29. Section through cuticula and subcuticular structures, x 2500. Not 

 a camera drawing. 



Fig. 30. Section of obtype, shell gland, and vitelline reservoir. X 500. 



Fig. 31. Cirrus pouch and cirrus in retracted condition, x 200. 



Fig. 32. Cirrus pouch with cirrus protruded, x 200. 



Fig. 33. Frontal section through distal end of vagina, x 200. 



Fig. 34. Transverse section through the middle of the cirrus pouch, x 600. 

 Not a camera drawing. 



Fig. 35. Section of obcapt and proximal end of oviduct, x 250. 



