38 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 



oval groups, extending obliquely backwards and inwards, but separated by a considerable 

 interval. Body somewhat depressed and elongated, with many prominent glandular tubercles, 

 and with pores about the parotid region. Lumbar glands of moderate size, of an elongated 

 oval form, and very convex. Legs rather slender, the anterior feet with the third toe con- 

 siderably the longest ; a small tubercle under each joint of all the toes, and several small 

 inconspicuous ones on the palm ; hinder legs rather elongated, the toes long, particularly the 

 fourth, the first very short ; a small tubercle under each joint ; the inner metatarsal tubercle 

 prominent, the outer one inconsiderable. 

 Colour. — The markings of this species are very elegant and striking. The ground colour of the 

 upper parts is a rich brown, with darker cloudings and marks ; a light yellowish longitudinal 

 line running all the length from the nose to the extremity of the body, a very irregular fascia 

 on each side of the same colour enclosing a brown oblong spot on the upper lip, another 

 just behind the tympanum, and two others on the sides ; there is also a brown fascia from the 

 extremity of the nose to each eye ; the lumbar glands are black and yellow, distinctly marked. 

 The limbs are obscurely banded with brown and pale yellowish. The colours in some speci- 

 mens are more obscure than in that figured, and they appear to lose their clearness with age. 



The following are the colours of the brighter individuals according to the observations of 

 Mr. Darwin : — " Yellowish and broccoli-brown, with darker brown marks ; broad medial dorsal 

 line, pale gallstone yellow ; lumbar glands saffron yellow and jet black." Another specimen was 

 " ash-grey with blackish brown marks." 



DIMENSIONS. 



In. Unes. 



Length of the head and body 1 8 



of the anterior extremities 1 



of the posterior extremities 2 4 



The general habit of this species is much more in accordance with its rela- 

 tion to the RanidcB than that of the other species of the genus. Its general form 

 is more elongated and depressed, and the limbs, particularly the hinder ones, are 

 longer in proportion to the body. It is certainly very near PL Bibronii of Tschudi, 

 but still undoubtedly distinct. 



