PLATE III. 
c 
cl. 
i. 
m. 
via. 
In all the Plates the following letters have the same signification. 
Marginal cirrus. 
Cloacal papilla or opening. 
Intestine. 
Mouth. 
Manubrium of the supporting stalk of the hook-apparatus. 
Ovarium. 
p. Parapodium. 
pli. Pharynx. 
s. Sucker. 
t. Testicle. 
u. Hook of the hook-apparatus. 
ov. Ovarium. <} Male genital papilla or opening. 
Note . — Tire coloured drawings show the object seven times magnified; the uncoloured drawings are drawn with the 
Oberhauser camera and objective 0 (Seibert and Krafft), which magnifies 40 diameters, the hook-apparatus with camera and 
objective I V., which magnifies 220 diameters, if the contrary be not expressly stated. 
Figs. 1-3. Myzostoma areolatum, n. sp. 
Fig. 1. From the dorsal side ; magnified 60 diameters. 
Fig. 2. From the ventral side. 
Fig. 3. Diagrammatic cross section. 
Figs. 4-8. Myzostoma compressum, n. sp. 
Fig. 4. Part of the hook-apparatus. 
Fig. 5. The animal seen from the side. 
Fig. 6. Seen from above. 
Fig. 7. Diagrammatic cross section. 
Fig. 8. Part of the hook-apparatus. 
Fig. 9. Myzostoma coronatum, n. sp. 
Fig. 9. The animal, seen from above ( C ), and from the ventral side ( A and B). 
Figs. 10 , 11 . Myzostoma folium, n. sp. 
Fig. 10. The animal, seen from the dorsal side ( C ), from below ( A and B). 
Fig. 11. Point of a hook. 
Fig. 12. Myzostoma radiatum, n. sp. 
Fig. 12. The animal, seen from below (A), and in diagrammatic cross section (B). 
Figs. 13-15. Myzostoma nigrescens, n. sp. 
Fig. 13. The animal seen from above, with one marginal border turned up. 
Fig. 14. Hook-apparatus. 
Fig. 15. An abnormal cirrus. 
Figs. 16-18. Myzostoma plicatum, n. sp. 
Fig. 16. From above. 
Fig. 17. From below. 
Fig. 18. Diagrammatic cross section ; magnified 8-9 diameters. 
Figs. 19, 20. Myzostoma brevipes, n. sp. 
Fig 19. Two individuals in situ. 
Fig. 20. Diagrammatic cross section. 
Figs. 21-23. Myzostoma pulvinar, Graff. 
Fig. 21. From above. 
Fig. 22. From below. 
Fig. 23. Point of a hook-apparatus protruded from the parapodium. 
Figs. 24-26. Myzostoma calycotyle, n. sp. 
Fig. 24. The animal, seen from the dorsal side ; magnified 15 diameters. 
Fig. 25. The same, from the ventral side; magnified 7 diameters, a. and b. the foremost pair of parapodia. 
Fig. 26. A parapodium and a sucker highly magnified. 
