PLATE II. 
Figs. 1-5. Filaria Jlabellata, . . 
Figs. 1, 2. Male and female ; natural size. 
Fig. 3. Head end. 
Fig. 4. Trifid supports of mouth-cavity. 
Fig. 5. Tail end of male, from the ventral surface. 
Figs. 6, 7. Filaria paradises?, 
Fig. 6. Animal ; natural size. 
Fig. 7. Tail end of male, from the right side. 
Figs. 8-10. Prothelmins profundissima, 
Fig. 8. Animal ; natural size. 
Fig. 9. Body-wall, from inner surface, a, Cuticle ; b, muscles ; c, cellular layer. 
Fig. 10. Body- wall, in cross section, a, Epidermis; b, cuticle; c, muscle; d, 
cellular layer. 
Figs. 11, 12. Tsenia clavulus, 
Fig. 11. Scolex. 
Fig. 12. Nail-like armature of the small apical sucker. 
Figs. 13, 14. Tsenia increscens, 
Fig. 13. Animal ; natural size. 
Fig. 14. Scolex. 
Fig. 15. Tsenia trichoglossi, 
Fig. 15. Ovum ; magnified 300 diameters. 
Figs. 16, 17. Tetrabothrium torulosum, . 
Fig. 16. Animal ; natural size. 
Fig. 17. Scolex. 
Figs. 18-20. Tetrabothrium auriculatum, 
Fig. 18. Animal; natural size. 
Fig. 19. Scolex. 
Fig. 20. Margin of proglottis, with cirri {a). 
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