AGAMA STELLIO. 
123 
sides of the head before, behind, and below the ear with many short, strong, spiny 
scales, either single or in small groups or rosettes ; the folds of the upper surface and 
sides of the neck and those on the sides of the body beset with single spines or small 
groups of spines. The body covered with minute granular scales, but with numerous 
enlarged keeled scales intermixed among them, especially on the mesial line of the 
back, and generally a single line of these enlarged scales from the occiput and continued 
to the anterior half of the back, with other irregular lines external to it ; enlarged scales 
arranged, more or less, in longitudinal but more especially in transverse series, and of 
the latter there are from 20 to 24 between the shoulders and the base of the tail. Many 
of the enlarged scales have sharp points and some of the largest external to the mesial 
line of the back are trihedral. The scales on the centre of the throat strongly 
keeled. Ventrals small and perfectly smooth. Limbs covered above with scattered, 
large, keeled spinose scales. The tail with keeled scales, arranged in well-defined 
segments, each whorl consisting of two rings in the anterior half and three in the 
terminal half. 
No gular pouch. A large prsecloacal patch of actively secreting scales in the male, 
numbering occasionally as many as 60, and an elongated patch of similar structures- on 
the mesial line of the abdomen. 
Kg. 7. 
Agarna stellio, Linn. 
Upper surface dark olive-grey or olive-brown, many of the scales on the side of the 
head and along the lower jaw yellow ; throat of the male deep leaden bluish, paler in 
the female, and in both occasionally reticulated with darker lines ; under surface dark 
greenish yellow ; tail yellowish below, brownish above, with 12 to 14 brown bands. 
6 . Snout to vent 284 millim., tail 170. 
k2 
