Plate IV. 



Fig. 1. Kc7-oeides gracilis, Whitehggc. Portion of colony iiat. size. 

 ,, 2. Keroeides gracilis, Whitehgge. 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 tennc, n. sp. Colony ( x lA) showing the support of siliceous 



sponge spicules. 

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



scarcely projecting polyps. 

 „ 8. Parisis indica, n. sp. Basal portion ( x 14) showing the disc of attachment. 

 ,, 'J. Parisis indica, n. sp. Part of a branch enlarged ( x H). Contrast the 



proportions of node and internode with those in fig. 8. 

 ,, 10. CJiironephthya macrospicidata, n. sp. Terminal portion enlarged ( x 12). 



Note the enormous spindles of the coenenchyma. 

 ,, 11. Suhe7-ogorgia kolUkeri, var. ceylonensis, Thomson. Branch nat. size. 

 „ 12. Sube7-ogorgia kdllikcri, var. ceylonensis, Thomson. Portion enlarged 



(xlO). 



