192 
THE OCEAN WORLD. 
nally snlcated, having the edges of the base crenated ; the lower part 
an obscure red, and the upper part transparent white, marked with 
fine purple spots; the outer circumference of the aperture has » 
narrow stripe of pink. When expanded, the superior division of 
the body seems formed of membrane. From perforated warts placed 
without order on the outer coat, issued white filamentous substances 
variously twisted together.” “ I have observed,” he adds, “ similar 
bodies ejected from the mouths of all the species of this genus which 
have fallen within my notice.” 
A. viesembryanthemum, (Johnston).— The A. equina of Lesson 
(Pl. I\ . Fig. 6), known in France as the Cut (Vane, is extremely common 
m the Channel on rocks between the tide marks. It attaches itself 
chiefly to rocks beaten by the waves and exposed to view at the moment 
of reflux. The body is from two to three inches in height, and from an 
inch to an inch and a half in diameter ; hemispherical when contracted, 
it resembles a bell perforated at the summit, dilated into a cylinder. 
When fully extended the tentacula are nearly equal to the height of the 
body, of a uniform liver colour, or olive green, and sometimes streaked 
with blue, having a greenish lino either continuous or in spots, the base 
generally of a greenish colour encircled with an azure blue line, often 
streaked with red. The tentacula are terminated by a small pore. Its 
colour is variable, but generally it is of a violet-red. Sometimes it 
presents round spots of a fine green ; at other times it is only of & 
greenish hue ; the edge of the feet have a narrow border of red, with 
green and blue beneath. 
Metridium dianthus has a thick body with russet grey skin, the 
disk strongly lobed, thin and transparent round the mouth; the 
tentacnla very numerous, very short, and occupying a broad, strong 
zone upon the disk. The mesial lines are whitish and wide apart ; 
externally they are closer, papiliform, and brown. This species i® 
found on stones and shells in the North Sea and in the Channel. 
The verrucous, or warty section of the Aatiniadm, have the lateral 
walls of the body covered with agglutinated tubercles, and well' 
developed feet. To this section belongs the Coriaceous Cereirs, Actinia- 
crassicornis (Johnston), and A. senilis (Hollard and Dicquemare), which 
seems to vary in habit. Hollard describes them as frequently buried 
in the sands on the shore, while Cocks describes them “ as attaching 
