CYAMUS. 81 
These creatures crawl but slowly, digging the hooks of 
their feet into the skin of the whale to the base of the 
claws, whence it is difficult to detach them by force, 
without cutting through the epidermis, when they are 
freed ; it is also dangerous to attempt their removal, as 
their strong claws easily penetrate the fingers, and cause 
considerable pain. ‘Their branchiz are brought together 
on the back, and directed forwards, except in E. gracilis, 
which carries them in the opposite direction. When de- 
tached, and placed in sea-water, they are unable to swim, 
neither their branchiz nor limbs enabling them to perform 
such an operation. Whena whale Is hoisted on board-ship, 
the Cyami attached to it extend their branchia, agitate 
their antennz and hooked legs, as if desirous to seize 
something else. If the branchie are cut, the animals do 
not appear to be affected, but when the antenne are 
similarly treated, the animals move about irregularly, 
from side to side and backwards, as if drunk. When 
injured, the branchiz are never renewed; but if the legs 
are broken off at the base, new limbs are produced ; but 
this is not the case if only a portion of the leg be injured: 
hence it is not unusual to meet with Cyami having one or 
more legs of smaller size than the rest. 
M. Roussel did not observe any species of Cyamus on 
the dolphin, cachalot, or “ baleine a ailerons.” He states 
that it is generally believed by the fishermen that the alba- 
trosses, which abound about the fishing stations, pick the 
Cyami off the bodies of the whales, but he had never 
found any of these crustacea in the stomachs of such 
specimens of these birds as he had dissected. 
The structure of the mouth and intestinal canal of the 
g, and not a 
suctorial, animal. Indeed, on opening its alimentary 
Cyamus sufficiently prove it to be a gnawin 
VOL. Il. G 
