Plate III. 



Fig 



i 

 2 



3 



4 



5- 

 6. 



7' 



— 8. 



Page 



Hymedesmia rugosa n. sp. Two oscula are seen. 2 /j 50 



Hymedesmia stylata n. sp. Two oscular papillae are seen. : / r 57 



Hymedesmia verrucosa n. sp. A fragment ! /i 58 



Hymedesmia perforata n. sp. J /i DI 



Hymedesmia basispinosa n. sp. '/i 64 



Hymedesmia occulta Bow., with distinct papillae. r /i 67 



Hymedesmia simillima n. sp. (a) on a stone together with a Hymcraphia (b); one oscular 



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



Hymedesmia Bowerbanki n. sp. (ff) and i7. clavigera n. sp. (3) growing together on a stone; 

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



— 9. Hymedesmia truncata 11. sp. on a stone; six papillse are seen. 1 / 1 77 



— 10. Hymedesmia latrunculioides n. sp., in the middle the oscular papilla. I / 1 78 



— 11. 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. 1 / 1 55, 83 



— 12. Hymedesmia filifcra O. Schmidt; peeled from its substratum. \/ t 86 



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



places the substratum of large sponge-spicules is seen. s / l 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. t / 1 — 



— 15. Hymedesmia digitata n. sp. I / 1 90 



— 16. Hymedesmia trichoma n. sp., growing on an Astarte-sheW. I / I 91 



— 17. Hymedesmia derma fa n. sp. Oscidar cones are seen. '/, 107 



— 18. Hymedesmia tornotata n. sp., on a Brachiopod. 1 j 1 109 



— 19. Hymedesmia mucronella n. sp., on a fragment of a Sipho. I / l no 



— 20. Grayella caruosa Tops. Cushion-shaped specimen, growing on a piece of Bicmma rosea. l / I 36 



— 21. Grayella caruosa Tops. Erect specimen with two oscula at the summit; at the base some 



adhering bottom material. 2 /i 36 



