424 On the Presence o/Echis coloratus in Africa. 



veiling spaces being reddish buff. The sides of the body on 

 the region of the serrated scales are marked with finely 

 speckled dusky spots, more or less connected with the dorsal 

 reticulations. There are also some dusky spots on the angles 

 of the ventrals. The ventral surface is white, but with faint 

 dusky spots here and there. This type of coloration corre- 

 sponds in its broad outlines with that of E. carinatus. In 

 two females of the latter species from Sind in the British 

 Museum there are 36 and 40 spots respectively much more 

 clearly and vividly defined than in E. coloratus, whilst on 

 the tail the spots are practically absent. A specimen from 

 Muskat in the British Museum has the same general type of 

 coloration, but the dark and light markings are less defined, 

 whilst in another young specimen from the same locality the 

 light spots are absent and the dark markings are reduced to 

 two very narrow parallel dorsal lines, largish brown spots 

 occurring on the lateral serrated scales and a small brown 

 spot on the angle of nearly every third ventral. In the 

 specimen supposed to have come from Socotra the general 

 colour above is dark slaty, with brown spots more or less 

 obscurely present along the mesial line of the back, and irre- 

 gularly shaped brown spots along the sides. No pale dorsal 

 spots are present, but the ventral surface is obscurely spotted 

 posteriorly. The specimens from the Dead Sea are pale 

 yellowish, with the dark and pale markings not clearly defined 

 and the ventrals immaculate. 



In no viper with infranasals has the head ever been found 

 to have its upper surface bearing the symmetrical dark brown 

 markings present in a greater or less degree in vipers with 

 their nasals resting directly on the rostral and on the front 

 upper labial. 



E. coloratus is as yet known only from Arabia, Southern 

 Syria (Dead Sea), the Eastern Desert of Egypt, and from 

 the island of Socotra. 



Ptyodactylus Hasselquistii, Donndorff. 



This is an example of the pallid typical form with the 

 nostril but little, if at all, tubular. This is the most southern 

 point it has yet been recorded from the Eastern Desert, but 

 it is common as far south as Wadi Haifa. 



Agama spinosa, Gray. 



Two specimens, differing in no respect from the examples 

 from Suakin. As already pointed out by me, the type of 



