FROGS OF COLOMBIA — COCHRAN AND GOIN 139 



Atelopus carrikeri Ruthven 



Plate 22 g-j 



1916. Alelopus carrikeri Ruthven, p. 1, pi. 1 (type locality, Paramo de Macos- 

 tama, Santa Marta Mountains, [Magdalena,] Colombia; 1922, p. 5. — 

 Dunn, 1944c, p. 518.— Rivero, 1963c, p. 107.— Gorham, 1963, p. 24. 



Description. — MCZ 4100 (paratype), an adult male from Don 

 Diego, Magdalena, Colombia. Head as long as broad, its length about 

 one-third of total length; tongue approximately two-fifths as wide as 

 mouth opening, stalked, its posterior border free and unnotched; 

 snout rather acuminate when viewed from above, rounded in profile, 

 the upper jaw extending well beyond the lower. Nostrils lateral, 

 scarcely projecting, their distance from end of snout equal to their 

 distance from eye. Can thus rostralis rounded but strongly developed; 

 loreal region vertical, concave, its lower part flaring very slightly to 

 the upper lip. Eye large, prominent, its diameter four-fifths its distance 

 from tip of snout; interorbital diameter 1% times that of upper eyelid 

 and a trifle greater than interval between nostrils. Fingers thick, fairly 

 long, with lateral ridges, free, first finger shorter than second, fourth 

 longer than either and reaching halfway on penultimate phalanx of 

 third; a small oval thumb pad present; a large round palmar callus; 

 metacarpal tubercles absent. Outer toes one-half webbed, thick, short, 

 third toe a little shorter than fifth, the tip of which reaches halfway 

 on antepenultimate phalanx of fourth; first toe distinct, entirely 

 webbed; a blunt oval iimer metatarsal tubercle and a smaller round 

 outer one; subarticular tubercles mostly double, not strongly devel- 

 oped; no tarsal ridge; a heavy inner skinfold on heel and knee. Body 

 fairly stout, in postaxillary region a little narrower than greatest 

 width of head. When arm is adpressed, tip of third finger reaches to 

 end of body; when hind leg is adpressed, heel reaches slightly beyond 

 axilla; when limbs are laid along the sides, knee and elbow are sep- 

 arated; when hind legs are bent at right angles to the body, heels are 

 separated. Skin of upper parts thick but smooth; a patch of small 

 spicules behind lower jaw, extending on shoulder and to forearm and 

 elbow; ventor smooth; a low glandular swelling from tip of snout 

 along canthus to posterior tympanic area, where it ends in a swollen 

 gland. No skinfold across the chest; no ventral disk; no external vocal 

 sacs in the male, but forearm greatly enlarged near elbow. 



Dimensions. — Head and body, 51.5 mm.; head length, 15.5 mm.; 

 head width, 15.5 mm.; femur, 17 mm.; tibia, 18.5 mm.; foot, 19 mm.; 

 hand, 14 mm. 



Color in alcohol. — Dorsum uniform blackish slate; venter uniform 

 slate gray excepting for a pale round spot on each side of chin below 

 mouth commissure; palms and soles slightly lighter gray. 



