76 The Cephalic Veins and Sinuses of Reptiles 
on Anolis caroliniensis. A number of specimens of this species had been 
obtained for study and some of them were moulting. One of the animals 
had already removed the old skin from the trunk and occiput, but the 
anterior part of the head was still covered. My attention was first at- 
tracted to this specimen by its attempt to remove the old stratum cor- 
neum by scratching the side of the head with the hind foot. A fragment 
of loose epidermis was hanging from the lower eyelid, which twitched at 
intervals as if to remove an irritating object. The scratching was re- 
peated several times, but without entirely removing the piece of epi- 
dermis. Then the animal became quiet, the eyelids closed and the entire 
Fie. 9. Sceloporus undulatus in ordinary resting condition, for compari- 
son with Figs. 10 and 11. X 3/2. 
orbital region began to swell, the enlargement proceeding with two 
distinct stages, as already described. 
This entire series of movements, protrusion of both eyes, and scratch- 
ing of the side of the head, was repeated at intervals until the irritating 
epidermis was finally removed. ‘The movements then ceased. 
On another occasion the same movements were observed in a moulting 
specimen of Sceloporus undulatus, all the details being reproduced which 
had been noted in Anolis, except the scratching. A substitute for this 
was found by rubbing the side of the head against the containing box. 
The swell movements were afterward duplicated by other specimens, both 
of Sceloporus and Anolis. In all cases they were directed toward the re- 
moval of the exuvie and ceased when the object was accomplished. 
