ACTINIAS AND OTHER ACTING ID POLYPS. 23 



and smaller in the diameter of the disk to over a foot, — 

 though commonly between half an inch and three inches. 

 One species from the Paumotu Coral Archipelago in the 



SAGARTIA MODESTA, V. 



Pacific, a colored figure of which is given in the Atlas of the 

 Author's Report on Zoophytes (Plate III.), had a diamet< r 

 across its disk of fourteen inches; and it was also one of the 

 most beautiful in those seas, having multitudes of tentacles 

 with carmine tips and yellowish bases, around the open centre, 

 gathered into a number of large groups or lobes. 



"With rare exceptions, Actinias live attached to stones, 

 shells, or the sea bottom, or are buried at base in the sand or 

 mud. The attached species have the power of locomotion, 

 through the muscles of the base, but only with extreme slow- 



