1 9 14] A New Cestode from A mi a Calva L. 117 



Fig. II. Reconstruction of the nervous system in the scolex and an- 

 terior proglottides, X 40. 



Fig. 12. Coronal section of the "end-proglottis", showing the relations 

 of excretory vessels; cv, dilatation of the median excretory 

 vessel, X 150. 



Fig. 13. Flame-cell: bb, basal body; cf, cilliary flame, X 300. 



Fig. 14. Transverse section of a lateral excretory vessel in the posterior 

 end of the scolex: bm, basement membrane; dvm, dorso- 

 ventral muscles, X iioo. 



Fig. 15. Proglottis 16 of a strobila, showing very early stage in the 

 development of the reproductive organs: agd, anlage of the 

 genital ducts, X 37. 



Fig. 16. 17th proglottis of same strobila, X 37. Figs. 15 and 16 are 

 drawn from oil-of-cedar transparencies. 



Fig. 17. Transparent preparation of a mature proglottis, — testes and 

 vitelline follicles not complete: vs, vesicula seminalis; vd, 

 vas deferens; cp, cirrus-pouch; co, cirrus-opening; vo, aper- 

 ture of vagina; ?fo, opening of uterus; 02;, ovary; X 60. 



Fig. 18. Transverse section through the interproglottidal region of the 

 unjointed portion of the strobila, X 130. 



Fig. 19. Same through the middle of the proglottis, only two eggs 

 shown in the gravid uterus-sac, X 130. 



Fig. 20, A single testis with its vas efferens: C3;^, cytophore, X 365. 



Fig. 21 . Sperm-reservoir at the posterior end of the vas deferens, X 365. 



Fig. 22. Anastomos of vasa efferentia near the sperm-reservoir: w, me- 

 dian line of the proglottis, X 200. 



Plate VI. 



Fig. 23. Cross-sections of vas deferens: ev, syncitial epithelium; mem, 

 myoblasts of circular muscles, X 1000. 



Fig. 24. Cross-section of cirrus, X 500. 



Fig. 25. Cross-section of younger cirrus, X 500. 



Fig. 26. Longitudinal section of receptaculum seminis and first portion 

 of spermaduct: s, sperms; sd, spermaduct, X 235. 



Fig. 27. Genital ducts in the generative space, posterior view of a re- 

 construction: cvd, common vitelline duct; od, oviduct; sd, 

 spermaduct; oc, oocapt; yr, yolk-reservoir, X 60. 



Fig. 28. Ova, showing accessory cells in connection with two: ac, 

 accessory cells; cy, cytoplasm, X 1000. 



Fig. 29. Individual yolk-cells: a, from follicles; b, from a collecting yolk- 

 duct, X 1000. 



r 



