4 J. D. Dana on Zoophytes. 
pinks, although but a single branch, 
and without the delicate tinting which 
characterizes these flow- 
er-animals. In the an- Fig, 18. 
nexed figure (18,) a : 
1 ubipora 
) is represented enlarged. 
& A large cluster, as it ap- 
pears in the water in 
full expansion, is close- 
ly like a bunch of lilac 
blossoms, both in 
of color and in the size of the polyp 
ects = flowers. 
28. All these animals have the same general structure, and dif- 
fer from the Hydroidea in the internal septa, possessed of geni- 
tal functions, which divide the visceral cavity into radiate com- 
partments, ($ 11.) They sometimes have a coriaceous or leathery 
exterior ; and instead of living in coral, the coral is contained in 
them. figure 13, the existence of coral is no more apparent 
externally, than in the fleshy Actinia. The tentacles are very 
various in number and size; they are sometimes long for pre- 
hension, and at others are nearly or quite rudimentary, being 
fitted only to aid in aeration. 
ow the stom- 
, onged inward 
has a free communication with the visceral cavity, being closed 
below only by muscles under the control of the animal. 
The septa in this = are much less numerous than in 
1 the 
* 
: Ran | the Actiniw, but are 
cerrect in representing the general arrangement. ‘ 
