24 



CLASSIFICATION OF THE ANIMAL KINGDOM. 



Fig. 19. Colony of Veretillum 

 cynomorium, of the natural size, with 

 the polypes protruded. 



Fig. 20. Pennatula sulcata, seen 

 from the dorsal side. Slightly 

 reduced, after Kolliker. 



Fig. 21. A, Fragment of the common Fan-coral (Rhipidogorgia flabellum), reduced about 

 one-half. B, Portion of the same enlarged, showing the polype-cells, c, Branchlet of the 

 same partly denuded of the soft parts, and showing the horny axis (a), n, E, and r, Flesh- 

 spicules ("dertnosclerites") of Gorgonidoe, greatly enlarged : p, of Gorgoiiia, radula; E, of 

 Sclerogorgia suberosa; F, of Melithcea ochracea. (After A. Agassiz and Kolliker.) 



