iSir.] GENUS ACTINIA. 171 



r, A. tricolor. Body soft, fleshy, of a fine orange 

 colour; base enlarged, furnished with several ranges of 

 perforated tubercles; periphery of the mouth with a circle 

 of blue, and another of orange. 



Tentacula diaphanous, unequal, conic, shorter than 

 the body, placed equidistant, in five ranges, the shortest 

 on the border, the longest in the centre, furnished with 

 four or five rows of small tubercles, and brown oblong 

 spots, alternating with the oval yellow ones; this mouth is 

 surrounded with tubercles. The ^ young of the species 

 are more diaphanous than the old; size about an inch in 

 diameter. Inhabits the island of Barbadoes; and attaches 

 itself to those shells which are tenanted by the Hermit 

 Crab. 



6. A. bicolor. Body divided longitudinally by brown 

 and white bands; the centre tentacula pointed, with a row 

 of white spots on the superior part. 



The body is fleshy, soft; base extended, furnished with 

 several rows of tubercles; the mouth reddish; the brown 

 bands of the body are ornamented with small white lines; 

 tentacula unequal, placed in four rows, alternating with 

 each other, the smallest at the margin; height and diame- 

 ter about six or seven lines. Inhabits the bay of the 

 island of St. Vincent; and is found adherent to shells. 



7. A. rapiformis, Tentacula short, cylindric, equal, 

 disposed in four rows; body fleshy, very contractile, as- 

 suming different forms, and frequently those of a turnip, 

 and a pear, the former of which it also resembles in its 

 dull, opaque, white colour; when contracted, it is of a 

 subglobular form. The young. arc more transparent than 

 the old, and are sometimes of a barker colour. 



