Plate VI. 

 ¥ui. 1. Thesioides inennis, n. g. et sp. Part of colouy nat. size. 

 „ 2. Thesioides inermis, n. g. et sp. Portion enlarged ( x 6). Note the peculiar 



tentacles. 

 ,, 3. Chrysogorgia diehotoma, u. sp. Axis nat. size to show mode of 

 branching. 



„ 4. Acamptogorgia hehrycoides, von Kocli. Branch ( x 2). 

 , 5. Acamptogo7'gia hehrycoides, von Koch. Terminal twig enlarged (x 10). 

 „ 6. Ceratoisis gracilis, n. sp. Part enlarged (x 11) to show characteristic 



armature of polyps ; (a) small portion nat. size. 

 ,, 7. Sympodium j)ulchrum, n. sp. Part of colony nat. size encrusting a 



sponge skeleton. 

 ,, 8. Sclerohelemnon koUikeri, u. sp. Portion enlarged ( x 5i). Note the peculiar 



pseudo-calyx and the siphonozooids. 



