DESCRIPTION OF PLATES. 



TJENIA FIMBRIATA, Diesing, 

 [Plate I is a copy of Diesing's original figures.] 



Adult, natural size. 

 Head, side view. 

 Head, top view.. 

 Segments near head. 



Segments further removed from head than Fig. 4. 

 Some still more remote. 

 From near end. 



Adult, natural size. From contracted alcoholic specimen. 

 Head, edge view, x 6. 

 Head, side view', x 6. 

 Head, top view, x 6. 



Portion of segment: a, genital pore; b, cirrhus pouch; c, semi- 

 nal apparatus; d, the efferent tube; e, the rudimentary uter- 

 ine apparatus; /, vagina; g, the receptacle of the semen; h, 

 finibriae. 

 Yig. 6. Portion of segment more mature than Fig. 5: a, genital pote; 



b, cirrhus pouch; d, efferent tube; c, the ute'ri. 

 Fig. 7. The uteri enlarged. 



Fig. 7a. The uteri still further enlarged, showing the contained embryo. 

 Fig. 8. A half -grown tcenia, showing the fimbriae, x 2. 

 Fig. 9. Fragment of taenia from near head, showing the lateral excre- 

 tory vessels. 

 Fig. 10. Terminal portion of adult, x 2: a, segments which have lost 



their contractility; b, separated segments. 



Fig. 11. External reproductive apparatus, x 40: a, genital pore; &, cir- 

 rhus pouch; c, penis; d, vagina, crossed by the excretory duct. 

 Fig. 12. Adult segment showing the symmetrical arrangement of the 

 reproductive apparatus: aa, genital pores: bb, uteri; cc, fim- 

 brise. 



Fig. 13. Embryos as they exist in the uteri: aa, envelopes; bb, embryo. 

 Fig. 14. Embryo showing envelope and its six hooks. 

 Fig. 15. Youngest taenia found. Natural length indicated by lines at 

 their sides. 



All specimens except figures from 1 to 4 and 15 were drawn 

 from fresh preparations. 



186 



