REPTILES. 37 



Description. — Head triangular, rather broader than long. Muzzle rounded. Eyes slightly pro- 

 minent. Tongue somewhat heart-shaped, scarcely emarginated behind. Palatine teeth very 

 few, and with difficulty perceptible, placed in two small groups between the posterior nares. 

 Body thick and broad, with numerous glandular tubercles scattered over the surface, princi- 

 pally on the anterior parts, and assuming somewhat of a longitudinal arrangement. Lumbar 

 glands large, round, and prominent. Legs robust and short. Toes of the fore feet wholly 

 separate, with a small tubercle under each joint, and two larger ones at the hinder part of the 

 palm. Hinder toes, with a rudimentary membrane at the base, a small tubercle under each 

 joint ; the first and second toes very short. A conical tubercle at the inner, and another at 

 the outer side of the metatarsus. 



Colour. — The upper surface is beautifully marbled with dark olive or black, on a light-green 

 ground ; some of the markings assume somewhat of an ocellated form, and approach to a 

 symmetrical arrangement. The lumbar glands are more strongly coloured than the other 

 parts, the centre being black, and nearly surrounded by a bright line of very light green, or 

 nearly white. The thighs are numerously banded with the prevailing colours, and a tinge of 

 orange or red. Beneath pale ; in some specimens blackish under the chin. 



The aspect of this species is remarkably bufonine ; and this character is in- 

 creased by the numerous glandular tubercles on the surface of the body, and 

 pores about the parotid region. It is, doubtless, similar in its habits to many of 

 the toads. 



DIMENSIONS. 



In. Lin. 



Length of the head and body 1 4 



of the anterior extremities 8 



of the posterior extremities 1 7 



It was repeatedly found by Mr. Darwin at Maldonado, near the mouth of 

 the river La Plata. 



Pleurodema elegans. Mihi. 

 Plate XVIL— Fig. 4. 



Dentibus palatinis prominentibus, in fasciculis birds ovatis obliqtm dispositis ; 

 lingua rotunda integrd ; glandulis lumborum ovalibus, valdb convexis ; digitis 

 posticis hand palmatis ; dorso tuberculalo-glanduloso, Jusco, nigro obscure ma- 

 culalo, fascia longitudinali pallida. 



Habitat, Valparaiso, Valdivia, and Archipelago of Chiloe. 



Description. — Head semi-elliptic, as broad as long. Muzzle rounded. Eyes very slightly promi- 

 nent. Tongue large, round, entire, very thick. Palatine teeth prominent, disposed in two 



