D R Y U R A. 285 



' Observ. — A few small tubercles are scattered over the occipital 

 region, the rest of the surface of the head being finely granular, 

 somewhat coarser, however, upon the fronto-nasal space. The scales 

 under the head are small, subgranuliform, preceded anteriorly by one 

 pair of quite large, subtriangular, mental shields, inclosing entirely 

 the symphyseal; and upon its sides, contiguous to the lower labial 

 plates, is a second pair of small mental shields or chin scales, as some- 

 times termed. The series of scales adjoining the lower labials are 

 somewhat elongated, and larger than the rest. The dorsal tubercles 

 do not extend over the arms and forearms, though they may be traced 

 along the hind legs as fiir as the tarsi. The series of femoral pores 

 of either side is separated from its fellow by an intervening scale. 



The color of the upper region is greyish-red, marbled or rather mar- 

 morated with dark brown ; the tail is transversely spotted, assuming 

 a serai-annulated aspect. The inferior region is whitish, unicolor. A 

 drawing from life was made in October, 1838. 



Log. — Port Praya, San Jago, Cape de Verde Islands. 



Plate XX Vj fig. 17, represents Hemklactylus cyanodactylus, size of 

 life. 



Fig. 18, is a view of the head from above; 

 Fig. 19, its profile; and. 

 Fig. 20, an under view of the same region. 

 Fig. 21, the left hand, from above; 

 Fig. 22, the same hand, from beneath. 

 Fig. 23, a group of dorsal scales; 

 Fig. 24, a group of abdominal scales. 

 Figs. 18-24, are somewhat magnified. 



Genus DORYURA, Gray. 



Gen. Char. — Fingers and toes free, dilated towards their anterior 

 extremity, and all provided with a nail or claw; plates, underneath, 

 in two diverging series, divided by a median groove. Femoral pores 

 absent. Back covered with minute, uniform, granular scales. Sides 

 of body and limbs, simple. Tail very much depressed, covered above 



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