410 



margin of the eye, if laid forwards ; the toes have the usual relative 

 length of the species of this genus. No femoral pores. 



The ground colour of the upper parts is shining brownish-green, 

 darker on the sides ; a series of black cross -stripes, angularly bent, 

 and with the angle pointing backwards along the middle of the back ; 

 they are more distinct in young than in old individuals ; the extre- 

 mities have some indistinct irregular brown spots : there is, in some 

 of the old specimens, a lighter stripe from above the tympanum 

 along the side of the back to the origin of the tail. A black gular 

 band, with some black dots besides, is complete in mature specimens, 

 indicated by two black lateral spots only in young ones ; the throat 

 before the collar is beautifully iridescent, the chest behind it intensely 

 yellow, and the belly and the anterior lower portion of the tail rose- 

 coloured. The latter colours are merely indicated in very young 



specimens. 



inches, lines. 

 Distance between the extremity of the snout and 



the tympanum 8 



Distance between the tympanum and the vent . . 2 4 



Length of the tail 6 



Distance between the extremity of the snout and 



the anterior margin of the orbit 3^ 



Distance between the anterior angles of the orbits 3^ 



Length of the entire fore-leg 1 4 



of the fourth finger 5 



of the entire hind-leg 2 4 



of the foot 1 2 



of the fourth toe 9 



12. Iguana tuberculata, Laur. 



13. Gymnodactylus caudiscutatus, n. sp. 



Diagnosis. — Scales of the back and of the sides granular, of the 

 belly rhombic and imbricate. The lower part of the tail with broad 

 shields, extending from one side to the other : five upper labials. 

 Snout rather depressed, nearly twice as long as the distance between 

 the eyes. Head white, reticulated with black. 



Hub. Andes of Ecuador. 



Description. — This species is allied to Homonota gaudichaudi and 

 Gymnodactylus d' orbignyi, from which it may be distinguished by 

 the caudal shields. The head and snout, the latter especially, are 

 much more depressed than in H. gaudichaudi, and appear also more 

 produced. The rostral shield is large, rounded, extending on to the 

 upper surface of the head ; the upper lip is bordered by five plates, 

 all the upper surface of the head and the sides being granular. The 

 lower median labial shield is oblong, far produced backwards, and 

 has a pair of small shields behind : there are three lower labials. 

 The ear-opening is small, situated horizontally on the same level with 

 the cleft of the mouth. All the upper and lateral parts are granu- 



