iSir.] GENUS ZOANTHUS. 177 



2. Z. Solandrl (Plate VIII. fig. 1.) Disc of a deep 

 reddish brown colour; tentacula short, sixty in number; 

 peduncle of a reddish yellow; when the animal is contract- 

 ed the summit is marked with deep blue angular spots, 

 and white lines. 



This species is also united in groups^ by the base of 

 their peduncles, amid the sand, at the surface of which 

 they raise their discs. Length about two inches. Tenta- 

 cula about sixty in number. 



Inhabits St. Thomas. 



3. Z. dubia. Centre of the disc green; tentacula and 

 mouth yellow. Tentacula placed in two rows, and very 

 numerous; body cylindric, pedunculated, reddish. 



,, This species differs from the sociata chiefly in its size, 

 which is about one third part less, and by its habitudes, it 

 being found in bunches, closely united, attached to vari- 

 ous marine bodies, such as fuci, &c, and is constantly 

 exposed, in all its parts, to the action of the water, w^hilst 

 iiie former conceals itself in the crevices of rocks. These 

 circumstances have induced me to record it as a distinct 

 species. 



Inhabits Guadaloupe. 



The characters of the genus Zoanthus, as laid down 

 by Mr. Cuvier, embrace the two following animals; but 

 it is necessary to observe that they differ as much from 

 the Zoanthi, as these differ from the Actiniae. I shall 

 propose a new genus, under the name of Maimmllt- 

 fera> 



Vol. I. M 



