Woodworth — Phagocata. 



PLATE II. 



Fig. 11. Cross section of an individual in the region of a young budding pharynx. 



Its connection with the intestine has not yet been established. X 300. 

 " 12. Portion of a cross section through one of the lateral pharynges. X 320. 

 " 13. A worm feeding on an Annelid ; five of the pharynges are visible. Killed 



with hot corrosive sublimate while feeding. X 10. 

 " 14. Portion of a cross section through young pharynx, showing the nucleated 



epithelia. The other tissues are not jet differentiated. X 300. 

 " 16. Portion of a cross section through the vagina in the region where the 



musculature reaches its greatest development. X 120. 

 " 16. Longitudinal section of the wall of one of the smaller pharynges. X 500. 

 " 17. Portion of a longitudinal section through the slime glands in the head 



region, where they pass over the brain. X 300. 

 " 18. Portion of a cross section of the body to show the reticulated mesenchyma 



and its relation to sagittal muscles. X 500. 

 " 19 and 19a. Portions of the incipient yolk glands, in Figure 19 the nuclei are 



seen in process of division. X 820. 

 " 20. A partial reconstruction of the whole worm showing the pharynges and 



their relation to the intestinal tract. X about 20 

 " 20a. Outline to show the appearance of the living worm while in progres- 

 sion. X 9. 

 " 20b and 20c. Outlines showing forms assumed by the worm when at rest. X 6. 

 " 21. Longitudinal section through the ovary and parovarium showing their 



relation to each other X 300. 

 " 22. Section through a parovarium at the time when the yolk glands are 



beginning to develop. From the same individual as Figures 19 



and 19a. X 820. 

 " 23. Cross section through the vas deferens. X 300 

 " 24. Portion of a section which passes through one of the testicular sacs, 



showing its tubular outgrowth, — vas efferens X 3o0. 



