PLATE 24. 



Figs. 1-5, 11. Section.s of Iflitliyoincnia ijorosii. X 55. Fig. 0-10, 12-14. Stroplioinenia regu- 

 laris. X 55. 



Fig.s. 1, 4, 11 of I. porcsa, correspond to lines B, C, A, fig. 6, pi. 5. 

 Figs. 2, 5 are along the lines E, D, fig. 1, pi. 6 (posterior end). 

 Fig. 3. .Section through middle of body. 



Figs. 6, 8, 9, 10, of S. regularis, are along the lines, C, D, H, A in fig. 8, |:)1. 26 (in fig. B read el in 

 place of ct). 



Fig. 7. Section of cuticle and hypodermis of S. regularis. X 205. 



Fig. 12. Section fhrougli one sense organ of anterior end of I. porosa. X 555. 



Fig. in. Section through one seminal receptacle and several stalks of S. regularis. X 255. 



Fig. 14. Blood corpuscles of S. regularis. X 555. 



