BY GERARD KREFFT, ESQ., F.L.S. 231 



Pig. 16. — Ovum, (outline.) 



Fig. 16a. — Head, much enlarged. 



Fig. 16&. — Perfect colony, (Outline sketch of the natural size) 

 This may be considered the typical form. 



Fig. 16c. — Terminal proglottides of the natural size discharging 

 ova, and without lemnisci, though these organs are 

 sometimes present (see figs. 7 and 7d). 



Fig. 16d. — The same view much enlarged. 



BOTHRIOCEPHALUS (?) MARGINATDS. 



Fig. 17. — Fragment without head (typical specimen). 

 Fig. 17a.. — -Proglottides enlarged, shewing the central pore or 

 orifice. 



T^NIA PARADOXA. 



Fig. 18. — Head, side view much enlarged (variety No. 1). 



Fig. 19. — Head, upper view shewing the four suckers, much 



enlarged. 

 Fig. 20. — Head side view shewing only two suckers. 

 Fig. 21. — ^Head, with proboscis and suckers much enlarged 



(outline sketch). 

 Fig. 21a. — The same head, natural size, variety No. 3. The 



small dot surmounting the conical neck represents 



the natural size of the much enlarged figure 



No. 21. 

 Fig. 21 &. — Terminal proglottides, natural size. 

 Fig. 22. — Ovum, with six-hooked embryo. 

 Fig. 22a. — One of the hooks; rough sketch (enlai'ged). 

 Fig. 23. Ovum, with six-hooked embryo, a second stage, and the 



most common form observed. 



T^KiA Bairdii. 



Fig. 24. — Head and neck much enlarged, variety No. 14. 

 Pig. 24a. — Terminal proglottides shewing accumulated ova, but 

 no lemnisci. 



