548 Observations on a few Species of Geckos. [No. 5 



animals have been introduced into the settlement in boxes, &c. from 

 Burmah, for I have hitherto only obtained them on Ross island, and 

 not from the main island. I do not think this can be a new species 

 for it is very common. 



8. Gecko Harriett, n. s. (Tytler). This beautiful little Gecko varies 

 in length from 2 to 8 inches. Its general colour is light brown, with 

 particularly pretty, dark markings : a dark mark extends from the nose 

 along the sides, but the colour is so very changeable that it is impossi- 

 ble to describe it : from a light straw, it instantaneously becomes almost 

 of a dark brown. It has five w T ell developed toes, with full sized suckers 

 under each. Irides bright copper colour. Tail equal in length to body. 

 Under portions lighter than upper, without markings. (The tail is curled 

 when at rest. J It is perfectly arboreal, frequenting trees, and is found 

 concealed under the bark : inhabits the Andamans ; all my specimens 

 are from Port Blair and its neighbourhood. I have named it after 

 Mrs. Tytler. 



All the Geckos which I have described above, have pupils which 

 contract like those of cats, and are more or less nocturnal in their 

 habits ; but the following species is quite diurnal, and the pupil does 

 not seem to contract, but remains round and full all day. 



9. Gecko chameleon (Tytler.) ; (Phelsuma Andamanense of Blyth) \ 

 about 4 to 6 inches long : general colour, in the sun or strong light, rich 

 emerald green, with blue or green tail ; under portions bright yellow ; 

 red marks on head and back in most individuals ; in dark places or in a 

 subdued light, the colour is perfectly dark, nearly black; the markings 

 slightly visible and the yellow usual on the under portions entirely 

 disappears. These lizards are quite arboreal. Feet with five toes ; 

 thumb very small ; suckers of moderate size : tongue bright red. 

 Peculiar to the Andamans, where the species is very common. 



