PLATK IV. 



FIG. 1. Keroeides gracilis, Whitelegge. Portion of colony nat. size. 

 2. Keroeides gracilis, Whitelegge. Part of twig enlarged ( x 10). Note the 



large and regularly arranged spicules. 

 ,, 3. Keroeides gracilis, Whitelegge. Portion of main stem enlarged (x 10) 



showing the smaller and more indefinitely arranged spicules. 

 ,, 4. Parisis indica, n. sp. Branch nat. size. 

 ., 5. Parisis indica, n. sp. Part of axis enlarged showing the clusters of 



epizoic Palythoa. 

 G. Sympodium tenue, n. sp. Colony ( x K) showing the support of siliceous 



sponge spicules. 

 7. Distichoptilum gracile, Verrill. Part enlarged ( x 10). Note the small, 



scarcely projecting polyps. 



,, 8. Parisis indica, n. sp. Basal portion ( x li) showing the disc of attachment. 

 ,, 9. Parisis indica, n. sp. Part of a branch enlarged ( x li). Contrast the 



proportions of node and intern ode with those in fig. 8. 

 ,, 10. Chironephthya macrospiculata, n. sp. Terminal portion enlarged ( x 12). 



Note the enormous spindles of the coenenchyma. 



,, 11. Suberogorgia kollikeri, var. ceylonensis, Thomson. Branch nat. size. 

 12. Suberogorgia kollikeri, var. ceylonensis, Thomson. Portion enlarged 



( x 10). 



