494 U.S. NATIONAL MUSEUM BULLETIN 2 88 



Geobatrachus walkeri Ruthven 



Figures 47, 48; Plate 67d-p 



1915. Geobatrachus walkeri Ruthven, p. 2 (type locality, San Lorenzo, Santa 

 Marta Mountains, Magdalena, Colombia); 1922, p. 50. — Dunn, 1944, 

 p. 519.— Peters, 1952, p. 15.— Gorham, 1963, p. 25. 



Description. — MZUM 47785 (holotype), from San Lorenzo, Santa 

 Marta Mountains, Magdalena, Colombia. No vomerine teeth. Choanae 

 small, rounded, and well separated; tongue one-half as wide as mouth 

 opening; long and narrow, its posterior border free and rounded. 

 Snout short, rounded when viewed from above, wedge-shaped in 

 profile, the upper jaw not extending appreciably beyond lower; 

 nostrils as superior as lateral, very slightly projecting, their distance 

 from end of snout about equal that from eye, separated from each 

 other by an interval half again as great as their distance from eye. 

 Canthus rostralis slightly defined; loreal region flat and very oblique, 

 the upper lip flaring out strongly below it. Eye small, not particularly 

 prominent, its diameter half again as great as its distance from 

 nostril; interorbital distance slightly less than width of upper eyelid, 

 which is relatively narrow and slightly less than distance between 

 nostrils. No tympanum apparent. Fingers not webbed, fourth finger 

 slightly longer than second; no projecting rudiment of a pollex; toes 

 (four) not webbed, second (usually third) and fourth (usually fifth) 

 subequal; a distinct oval inner but no apparent outer metatarsal 

 tubercle; no tarsal ridge; no dermal appendage on heel. Body short 

 and stubby, in postaxillary region definitely exceeding greatest width 

 of head; when hind leg is adpressed, heel not reaching posterior 

 margin of eye; when limbs are laid along the side, knee and elbow 

 fail to touch; when hind legs are bent at right angles to body, heels 

 just touch. No patagium. Skin of upper parts smooth; skin of throat 

 and chest smooth; that of belly and lower femur uniformly and very 

 finely granular; no traces of a skinfold across chest; no inguinal gland, 

 no vocal sac apparent. Skin of head not co-ossified with skull, roof of 

 skull not exostosed. 



Dimensions. — Head and body, 20 mm.; head length, 6.6 mm.; 

 head width, 6.8 mm.; femur, 7.6 mm.; tibia, 7.7 mm.; foot, 7.5 mm.; 

 hand, 4.3 mm. 



Color in alcohol. — A warm brown above, a dirty, lighter brown 

 below. 



Figure 47. — Tadpole, Geobatrachus walkeri (X 2). 



