346 Mr. P. H. Gosse on a new genus and 



Its change is to a nearly uniform brownish black, in which the 

 markings are but just distinguishable by a slight difference of 

 shade; sometimes, however, the whitish areas of the back are 

 more than usually conspicuous, especially one upon the rump of 

 a hastate form. 



Hab. Jamaica. In the same situations as the preceding species. 

 Very common. Specimens in Brit. Mus. 



3. Draconura catenata. The Chain-marked Anolis. Three or 

 four series of keeled scales run down the back, slightly larger 

 than those of the sides, but diminishing gradually towards them. 

 Muzzle clothed with irregular, subequal, polygonal scales, two- 

 or three-keeled. Ears linear, perpendicular. Tail slightly com- 

 pressed. S ' Length of body ly^^ inch ; of tail 3 inches ; total 4y^(j 

 inches. Pale dusky or drab, divided by two paler bands running 

 down each side and one down the middle of the back. Along 

 the dark band on each side of the mesial line, a series of irregular- 

 oval spots of blackish hue runs from the shoulders to the extremity 

 of the tail ; a band of the same hue passes diagonally from a point 

 between the eye and ear, meeting at the nape. Legs and upper 

 parts tinged with fawn colour; thighs and legs obscurely banded 

 with black. Lips mottled with blackish. Goitre rich crimson. 

 Under parts whitish with an opaline lustre. 



Its change is from a state in which the hue is pale, and the 

 spots only just visible, to a much darker hue, the spots nearly 

 black, the sides and belly mottled with blackish. The only spe- 

 cimen I ever met with was a male, apparently adult, the testes 

 large. 



Hob, Bluefields, in Jamaica. Rare. Brit. Mus. 



Genus Placopsis (ttXc^, a broad plate, and oi|rt9, the face). 



Nostril superior, above the eye-ridge, subapical. Toes dilated, 

 unequal. Femoral pores none. Head lengthened, covered from 

 the interparietal to the muzzle with large, angular, smooth plates, 

 without any small scales : rostral plate erect ; jaws even ; rounded. 

 Ventral scales imbricate, flat. Back and sides covered with 

 smooth, oval, flat scales, not imbricate, separated by minute 

 grains. Scales on each side of the goitre long-oval, loosely imbri- 

 cate. Tail compressed, with a dentelated crest above; keels 

 forming ridges beneath. 



4. Placopsis ocellata. The Plate-headed Anolis. Head four- 

 sided, flattened. Interparietal oblong, rounded behind, square 

 in front. Ears small. Goitre very large. Nape slightly crested, 

 only in adult. ^ . Length of body 3 inches, of tail 3| inches ; 

 total 6| inches. Ground colour delicate greenish white, crossed 

 by interrupted and irregular bands of black, of which about four 

 are situated on the body, and about eight on the tail ; the latter 



