478 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
On the head there is a single pair of these cirri, 
which remind one of slight horns, over the eyes (Pl. I, 
fig. 1, /.d.c.), and down the back there are about seven 
rather irregular rows of five or six papillae. However, 
when Eledone is agitated or moving about, the skin 
appears to become tightened over the surface of the body, 
_ and this stretching causes the granules and cirri to flatten 
down, and become indistinguishable from the rest of the 
surface. After a short period of rest, the slackening of 
the skin causes the granules and cirri to reappear. These 
processes are not visible after death, and so a true idea 
of the skin of Eledone can only be gained by watching the 
living animal, 
The colouration of the body is due to _ the 
chromatophores which le in the dermis, and are only 
absent from (1) the oral surface of the web, and (2) the 
suckers and the oral surface of the basal parts of the 
arms. Hence these parts are white, but when the web is 
stretched open, the chromatophores on its aboral side may 
be seen through as greenish dots, by transparency. The 
following notes were made as to the colouration of 
Kledones kept in the tanks of the Plymouth aquarium, 
when undisturbed :— ) 
1. Lower or ventral aboral surface of web light buff, 
with a pale green metallic tinge. 
2. Dorsal aboral surface of web buff mainly, with 
flecks of cream scattered in between the predominating 
patches of buff; aboral surface of arms similar. 7 
3. Funnel hght and_ practically colourless 
posteriorly, with yellowish-brown colouration anteriorly. 
The colour is deeper on the dorsal than on the ventral 
surface of the funnel, where there is also some indication 
of the metallic green tinge which is found on the ventral 
surface of the web, and of the mantle sac. ‘ 
