448 J. A. G'drufh itml L B. Bull: 



Fig. 2. — Wallaby cyst, early stage. (Drawn by aid of camera 

 lucida.) 



Plate LXXIII. 



Fig. 3. — Wallaby. Oblique longitudinal section, showing 

 groups of cysts in various stages of development, with 

 surrounding inflammatory tissue. («) muscle coats, 

 (Ij) mucosa, (c) groups of cysts, {(I) inflammatory tissue. 

 (Pliotomicrograph x 18). 



Fig. 4. — Wallaby. Transverse section of intestine, showing 

 many cysts. (Photomicrograph x 18). 



Plate LXXIV. 



Fig. 5. — Wallaby. Eidge of young cysit, showing regular 

 fringe, endoplasm and blastophores. (Photomicrograph 

 X 420). 



Fig. 6. — Wallaby. Edge of mature cyst, showing very irregu- 

 lar fringe, with atrophy of muscular and mucous coats. 

 (Pliotomicrograph x 460). 



Plate LXXV. 



Fig. 7. — Wallaby cyst. Blastophore, showing mature spores 

 with masses of residual protoplasm. The radial arrange- 

 ments of the spores has disappeai-ed, and the masses 

 of residual protoplasm are unusually large. (Drawn by 

 the aid of camera lucida.) 



Fig. 8. — Wallaby. Mature spores of parasitic cysts, drawn 

 from smears. (Drawn by aid of camera lucida.) 



Plate LXXYI. 



Fig. 9. — Kangaroo. Section showing two groups of large 

 cysts. («) early stage, (h) stage of almost maturity, 

 sliowing hypertrophied and cresentic cell-nuclei at peri- 

 phery (c) groups of small "cysts' ill vicinity. (Plioto" 

 micrograph x 110). 



P'ig. 10. — Kangaroo. Groups of large cysts, showing hyper- 

 trophied cell nuclei. (Photomicrograph x 340). 



