82 CYAMID. 
canal small portions of the skin of the whale are found 
in it, and on removing the Cyamus from the whale, the 
epidermis, whence it is taken, is found to have been 
enawed off. 
The eggs of the Cyami are spherical, agglomerated, 
and of a yellowish-white colour: they are deposited in 
the ventral pouch, which is formed of thin mem- 
branous plates, ciliated along the margin, and here the 
young are hatched and carried until they are fully 
developed. Whilst the eggs remain in the incubatory 
pouch, the female detaches herself from her companions, 
rejoining them when she had got rid of her young brood. 
The young ones are complete in all their parts; the head, 
however, is proportionally of an enlarged size, the bran- 
chiz globular, the anterior pair of legs not much smaller 
than the following, and the antenne short. There ap- 
pears, according to M. Roussel de Vauzeme, considerable 
difference in the treatment of the young brood by their 
parents. The females of C. ovalis arrange themselves 
side by side on the tubercles of the head of the whale, 
covering their young with their bodies, which form 
strong shields for their protection. In C. gracilis, on the 
contrary, the females and males, as well as young, are 
mixed together, whilst the young of C. erraticus are found 
isolated and fixed on the different parts of the body 
where they had been left by their parents; but in ac- 
cordance with their future mode of life, M. Roussel 
gives a curious instance of the effect of the distinction of 
habits in the different species of this genus: in answer 
to an inquiry by Messrs. Audouin and Milne Edwards, 
as to whether Cyamis gracilis might not be the young 
state of C. ovalis, M. Roussel relied on the different 
habits and colour, as well as the particular form of the 
