2l6 



THE OCEAN WORLD. 



fixes itself upon the rocks on the sea-shore, and covers itself with 

 sand. Its trunk, of cylindrical form, is of a flesh-colour, with vertical 

 lines, having red points. The interior tentacles form two simple 

 elongated rows ; the exterior tentacles are spatulate and lobed, not 

 very unlike the leaves of the oak. 



Fig- 75- — Phyllactis prsetexta (Dana), natural size. 



The sub-family Thalassianthinae, is distinguished from the pre- 

 ceding by having all its tentacula short, pinnate, and branching, or 

 papilliferous. One species only is known, Thalassiatithiis aster, of a 

 slate colour, which inhabits the Red Sea. 



The sub-family Minyadinse seem to represent among the 

 Zoantharia the Pennatula among the Alcyonaria. In the case of 

 these animals, the base of the body, in place of extending itself in a 



