Plate IV. 



Fig. 1. EcJtinofjorgia intermedia, Studer. Twig enlarged ( x 2). 



2. Eumuricea splendens, n. sp. Tip of twig enlarged ( x 8). 



3. „ „ „ Colony, nat. size. 



4. Ads rigida, n. sp. Portion enlarged ( x 2). 



5. Micella reticulata, n. sp. Tip of twig enlarged ( x 5). 



6. Echinomuricea. uliginosa, n. sp. Colony, nat. size. 



7. „ ,, „ Portion enlarged ( x 12). 



8. EcJiinovmricea macrospiciilata, n. sp. Part enlarged ( x 8). 



9. Acis rigida, n. sp. Portion enlarged ( x 8). 



10. Verrucella flexuosa, Klunzinger. Portion enlarged ( x 2). 



11. Echinog(yrgia intermedia, Studer. Twig enlarged ( x 7). 



