ELEDONE. 473 
sinking downwards through the water. Then the tips 
of the arms separate radially like the ribs of an umbrella, 
so as to stretch out the triangular pieces of web between 
the arms. 
Kledone has another mode of progression—creeping. 
This it does with a gliding motion, sometimes slowly, at 
other times more rapidly-—particularly when in pursuit of 
food. When creeping, the body is raised from the floor 
of the tank, and the animal advances somewhat in the 
posture of the Text fig. I, creeping by means of the 
suckers on the middle region of the arms. Sometimes 
Fic. 1.—Hledone cirrosa, at rest. 
the suckers further down are used, and consequently the 
body is raised higher, while the animal appears to 
advance on tip-toe. Iledone generally creeps thus when 
stalking prey. Often when creeping up the wall of the 
tank, the arms are well separated, so that the web is 
half extended. Apparently, Hledone only swims when 
seeking to escape. Possibly when not in captivity it 
may have nocturnal periods of activity, when swimming 
takes place. Careful watching of active specimens has 
not, however, revealed this habit, but that may be 
explained, perhaps, as due to artificial conditions. 
