ACTINIA. 94.5 
nation it is found to be distinct. It is only about half a 
inch in diameter, and rather less in height. It is olive-green, 
with snow-white stripes. The tentacula are numerous. 
Dr. Johnston gives the following interesting account of it: 
“This small but exceedingly pretty species has often in- 
terested us in observing its habits. It occupies a hole 
fitted to the size of its body, im our shelving, soft, slaty 
rocks, where, when covered with water, it expands into a 
wide circle, its oral disc and tentacula raising them scarcely 
above the level of its habitation. Thus the Acta retains 
itself unbosomed, as if proud to display the beauty that its 
Author has given it; but should, perchance, a rude hand or 
foe touch or ruffle the tentacula, then doth the creature 
instantly shrink and withdraw within itself and its furrow, 
until it has become nearly undistinguishable. The deserted 
holes bored by the Pholas is a favourite retreat for this 
Actinia, hence the specific name Troglodytes,” suggested by 
Mr. Price, in reference to the little classical people of that 
name, said to live in dens and caves near the Arabian Gulf. 
8. ACTINIA ALBA, Cocks. 
Hab. Coast of Cornwall, in the crevices of rocks, W. P. 
Cocks. 
This is minute, half an inch in diameter when expanded ; 
