1817.] ANATOMICAL DESCRIPTIONS. 183 



sections of the other species. At the opening of the mouth 

 one distinguishes several pairs of fleshy appendages; be- 

 tween those of the interior are several plaits. The interior 

 aperture of the stomach is furnished with small membranes. 

 The air-bladder disc resembles much that of the A. ultra- 

 marina, but it rises conically, and is yellow at its summit; 

 in the other species this disc is fiat. 



Zoanthus SolandrL (Plate VIII. fig. 1.) The body 

 of this animal is conic, and long, and hollowed through 

 its whole extent, its base being in the form of a root. 

 This body is composed externally of a strong coriaceous 

 tunic, which becomes finely wrinkled by the contraction 

 of the muscles; beneath this there is a second tunic, weaker 

 and transparent; and beneath this last a third tunic, which is 

 membranaceous, and presents towards the superior region 

 a vascular reticulation. To this last tunic are attached 

 about sixty pairs of white filaments, each pair united by 

 straight membranes, twenty of which bear ovaries, which 

 are brown and very short. These ovaries appear to rise 

 from as many thick, arcuated organs, striated in annula- 

 tions, folded on each other, and divided, through their 

 v^^hole length, by a small canal. The colour of this organ 

 is opaque yellowish white; it is attached, by its upper 

 part, to the base of the stomach, which is plaited, and very 

 short, compared with the length of the animal; it is placed 

 in the centre, and supported by the membranes which 

 form the cells, as in the preceding species. It is equally 

 furnished with two apertures, the upper one is the mouth, 

 and the other communicates with the internal parts of the 

 body. 



Mammillifera Auricula* The body of this species is 

 short, conic; soft, and covered with a smooth skin. The 



