EXPLANATION OF THE FIGURES. 



PLATE I. 



Fig. 1. — Distomum lieterostomum, Rud. (?) ; m, vitellogen ; sch, "schluck- 

 oeffnung ;" t, testes. 



Fig. 2. — End of an intestinal coecum of the same. 



Fig. 3. — D. asperum, n. sp. ; ga, genital aperture ; vo, the ovary ; tv, 

 transverse vitello-duct. 



Fig. 4. — Head of same ; the characteristic disposition of the hooks is best 

 represented on the right side. 



Fig. 5 — An isolated body-spine of the same. 



Fig. 6. — D. reticulatum, n. sp.; the ventral sucker {vs) is flattened ; u, the 

 uterus ; Iv, the ventral ; Ivd, the dorsal longitudinal vitello- 

 duct ; tf, the testicular tubes. 



Fig. 7. — Surface view of intestinal epithelium of D. variegatum, Eud. 



Fig. 8. — Caudal sucker of Octobothrium sagittatum, F. S. Leuck. (?). 



Fig. 9. — Polystomum oblongum, n. sp.; I, larva; ck, cirrus-coronet; va, 

 vaginae ; ov, shell-gland (?). 



Fig. 10. — Large caudal hook of the same. 



Fig. 11. — Small caudal hook of the same. 



Fig. 12. — Sphyranura Osleri, n. sp. ; ov, eggs. 



Fig. 13. — Large caudal hook of same. 



Fig. 14. — Small caudal hook of same. ' 



Fig. 15. — Proglottis of Taenia dispar, O-oeze. / 



Fig. 16. — Cervical papilla of Filaria triaenucha, n. sp. 



Fig. 17. — Head of Ancyracanthus cystidicola, Schn. 



Fig. 18. — Head of A. serratus, n. sp. 



PLATE II. 

 Fig. 19. — Octobothrium sagittatum, F. S. Leuck. (?) ; ga, genital aperture ; 



0, a mature ovum ; ov, the ovary ; vd, vas deferens. 

 Fig. 20. — Anterior end of same to show shape of mouth, anterior suckers 



and pharjTix. 

 Fig. 21. — Genital sucker of same ; a, superficial ; b, deeper view. 

 Fig. 22,— Mature ovum. 



