BARBOUR AND NOBLE: AMPHIBIANS FROM PERU. 



417 



choanae enlarged and at a slight angle to each other; tongue small, longer than 

 broad. Interorbital space nearly two times as broad as the length of the eye; 

 tympanum hidden, the region covered by two loose flaps of skin. Digits 

 slender but edged on either side by a seam of sldn which does not develop into 

 a web, tips not dilated; the first finger a trifle longer than second, equal in 

 length to the fourth; the elbow extended forward reaches only about three 



Fig. 6. — Telmatobius culeus (Garman). 1. Foot. 2. Hand. 3. Open mouth. 



fourths of the distance to the orbit. Toes fully webbed but deeply notched, 

 making them appear slightly more than half webbed; a free border of skin on 

 the inner side of the tarsus and a narrower one on the outer edge of the fom-th 

 toe; subarticular tubercles barely visible, the metatarsal tubercles the most 

 distinct; heels almost in contact when the hind limbs are folded at right angles 

 to the axis of the body; the tibiotarsal articulation reaches slightly beyond the 

 angle of the mouth, when the hind limb is carried forward along the body. 

 Skin smooth, the entire upper surface glandular, the glands appearing as 

 numerous small depressions; skin very loose and baggy, falling into a number 

 of large folds and flaps; a supraocular fold continued posteriorly to form a 

 supratympanic and lateral fold, several transverse folds on the sides; a very 

 wide, loose, liquid-filled bag or flap extending along the posterior side of each 

 thigh; many folds on the appendages due to the loose character of the skin. 



Color slate-grey above thickly spotted with white; the spots more abun- 

 dant ventrally giving the under surface a lighter appearance. 



