Plate III. 



Page 

 Fig. i. Hymedesmia rugosa n. sp. Two oscula are seen. z j l 50 



2. Hymedesmia stylata n. sp. Two oscular papillae are seen. I / I 57 



3. Hymedesmia verrucosa n. sp. A fragment. I / 1 58 



4. Hymedesmia perforata n. sp. : / r 61 



5. Hymedesmia basispinosa n. sp. '/ t 64 



6. Hymedesmia occulta Bow., with distinct papillae. I / s 67 



7. Hymedesmia simillima n. sp. (a) on a stone together with a Hymeraphia (^); one oscular 



and two pore-papillae are seen. I / 1 69 



8. Hymedesmia Bower banki n. sp. (#) and //. clavigera n. sp. (^) growing together on a stone; 



below them is a Polymastia; c. is a Mesapos, and to the left of it grows a Bryozoon. I / l . . 62, 75 



9. Hymedesmia truncata n. sp. on a stone; six papillae are seen. : /j 77 



10. Hymedesmia latrunculioides n. sp., in the middle the oscular papilla, '/i 7^ 



n. Hymedesmia crux O. Schmidt and H. nummulus n. sp.; the large sponge is H. crux, 



oscula are distinctly seen; the circular, white spot is the base of a Horncra, on the 

 left side of it grows H. nummulus; a. is a Mesapos. I j l 55, 83 



- 12. Hymedesmia filifera O. Schmidt; peeled from its substratum. */, 8 



13. Hymedesmia grandis n. sp. A large, somewhat folded specimen, seen from above; on two 



places the substratum of large sponge-spicules is seen, '/i 88 



14. Hymedesmia grandis n. sp. A specimen cut through, showing the substratum of large 



sponge-spicules; the bordering line of the sponge-tissue downwards is distinctly seen. : /i 



15. Hymedesmia digitata n. sp. J /i 9 



- 16. Hymedesmia trichoma n. sp., growing on an Astarte-s\iz\\. I / I 91 



- 17. Hymedesmia dermata n. sp. Oscular cones are seen. I / I 107 



- 18. Hymedesmia tornotata n. sp., on a Brachiopod. I / 1 109 



19. Hymedesmia mucronella n. sp., on a fragment of a Sipho. r /j no 



20. Grayella carnosa Tops. Cushion-shaped specimen, growing on a piece of Biemma rosca. I / l 36 



- 21. Grayella carnosa Tops. Erect specimen with two oscula at the summit; at the base some 



adhering bottom material. 2 /j 36 



