ILLUSTRATIONS. 



PLATE. 



PLATE I. A portion of the pyloric end of a hog's stomach, infested with Arduenna 



strongylina and Physocephalus sexalatus Frontispiece 



TEXT FIGURES. 



Page. 



FIG. 1. Arduenna strongylina. Median view of cephalic end 10 



2. Arduenna strongylina. Burea of male, ventral view 11 



3. Arduenna strongylina. Posterior end of body of male, viewed from right 



side 12 



4. Arduenna strongylina. Posterior end of body of female, viewed from 



leftside 12 



5. Arduenna strongylina. Ventral view of middle of body of female. ... 13 



6. Arduenna strongylina. Lateral view of egg removed from a ruptured 



uterus 13 



7. Arduenna strongylina. Short spicule with retractor muscles, viewed 



from right side 14 



8. Arduenna strongylina. Posterior end of body of male, viewed from 



leftside 14 



9. Arduenna strongylina. Cross section through body of female in the 



region of the vulva 15 



10. Arduenna strongylina. General view of body of male from right side. 15 



11. Arduenna strongylina. General view of body of female from left side . 16 



12. Arduenna strongylina. Cephalic end 17 



13. Arduenna strongylina. Bursa of male, ventral view 17 



14. Physocephalus sexalatus. Lateral view of cephalic end 18 



15. Physocephalus sexalatus. Lateral view of cephalic end 18 



16. Arduenna dentata. Median view of cephalic end 20 



17. Arduenna dentata. Bursa of male, ventral view 20 



18. Physocephalus sexalatus. Dorsal view of anterior end of body 22 



19. Physocephalus sexalatus. Posterior end of body of male 23 



20. Physocephalus sexalatus. Bursa of male, viewed from left side 24 



21. Physocephalus sexalatus. Posterior end of body of female, ventral 



view 25 



22. Physocephalus sexalatus. Ventral view of body of female in the region 



of the vulva 25 



23. Physocephalus sexalatus. Lateral view of egg removed from a ruptured 



uterus 26 



24. Physocephalus sexalatus. Bursa of male, ventral view 26 



25. Physocephalus sexalatus. Cross section through anterior part of body. . 27 



26. Physocephalus sexalatus. Ventral view of body of female 27 



27. Physocephalus sexalatus. Lateral view of anterior end of body 28 



28. Physocephalus sexalatus. General view of body of male 29 



