84 THE REPTILES OF THE GALAPAGOS ISLANDS. 



Tail tapering, subround, covered with small imbricate 

 scales above and larger ones beneath. The median row 

 under the tail is subject to great variation : on two of the 

 specimens the scales are about twice as broad as long ; on 

 two others they are so broad as to reach from side to side 

 of the tail. The granules of the throat are fine, quite as 

 small as those of the occiput ; near the labials and submen- 

 tals they rapidly increase in size. 



Body and limbs dark brownish ; back darker, with 

 numerous small spots of light blue. A dark-edged spot 

 of the blue above the shoulder. In front of each shoulder 

 there is a vertical band of bluish that does not reach the 

 median line on the top of the neck. Along the verte- 

 bral line the back is lighter, and along this light band 

 there are five pairs of dark spots, and at the hinder edge 

 of each of these spots there is a smaller one of the light 

 color. The first pair of the spots lies transversely in front 

 of the vertical band, the second behind the shoulders, the 

 third near the middle of the body, the fourth in front of 

 the leg, and the fifth across the base of the tail. 



Chin and throat yellow to orange. Top and sides of 

 head brown ; with a yellow band from the angle of the 

 mouth to the nape, another from the eye to the parietal 

 region, and a third from the nostrils backward over the 

 supraorbitals. On the crown the disposition of the yellow 

 is irregular, but on each specimen there is a short median 

 streak of the light color. 



This form is very closely allied to Gray's species G. 

 ocellatus from Tobago. The principal differences seem 

 to be in the coloration. The vertical streak is in front of 

 the shoulder, and to reach the latter would have to turn 

 back at its lower end. The head is not so high, and the 

 outline from rostral to occiput is very slightly but quite 

 regularly curved. In the figure given, by Dr. Boulenger, 



