FROGS OF COLOMBIA — COCHRAN AND GOIN 367 



opening, broadly cordiform, its posterior border free and slightly- 

 notched; snout very broad, rounded when viewed from above, slanting 

 forward and flat in profile, the upper jaw extending very slightly 

 beyond the lower. Nostrils directed upwards, scarcely projecting, 

 located on anterior slope of the snout a trifle nearer to anterior corner 

 of eye than to edge of jaw. Can thus rostralis blunt; loreal region 

 nearly flat, not well differentiated, merging gradually with the upper 

 lip. Eye small, sunken, its diameter two-fifths its distance from tip 

 of snout; a single "horn" on upper eyelid, about three-fourths as 

 long as width of eyelid; interorbital diameter twice that of upper 

 eyelid, greater than interval between nostrils. Tympanum distinct, 

 its greatest diameter three-fourths that of eye, separated from eye 

 by an interval equal to twice its own diameter. Fingers moderate, 

 with very weak lateral ridges and slightly bulbous tips, free, first 

 finger a little longer than second, fourth longer than either, reaching 

 beyond base of penultimate phalanx of third; a flat oval thumb pad 

 present; a larger, indistinct palmar callus; metacarpal tubercles well 

 developed. Toes one-half webbed, third toe slightly longer than fifth, 

 its tip reaching to base of antepenultimate phalanx of fourth; a long 

 blunt inner metatarsal tubercle, and a larger flat outer one; a heavy 

 tarsal ridge, ending near heel; a series of skinfolds on heel and knee. 

 Body very stout, in postaxillary region nearly equal to greatest 

 width of head. When hind leg is adpressed, heel reaches angle of 

 mouth; when limbs are laid along the sides, knee and elbow are 

 widely separated; when hind legs are bent at right angles to body, 

 heels are widely separated. Skin of upper parts finely granular with 

 many coarse tubercles in more or less regular diagonal series from 

 the shoulders backwards; a specially strong row of tubercles along 

 the V-shaped median bony section of back, the tubercles fused into 

 longtudinal ridges anteriorly, the bony area nearly smooth between 

 these ridges; venter coarsely granular, with small tubercles on throat 

 and lower surface of femur; a very heavy glandular ridge from pos- 

 terior corner of eye above tympanum, ending in a prominent swelling 

 just behind tympanum; a large flat gland on proximal anterior 

 femur; no skinfold across chest; no ventral disk; a median external 

 vocal sac in the male. 



Dimensions. — Head and body, 94 mm.; head length, 45 mm.; head 

 width, 63 mm.; femur, 38.5 mm.; tibia, 37.5 mm.; foot, 36.5 mm.; 

 hand, 30.5 mm. 



Color in alcohol. — Dorsum olive gray, the median dorsal area dull 

 olive buff darkening to drab-gray on occipital and supratympanic 

 areas; a slate-black spot with irregular outer borders from behind the 

 eyes bordering the longitudinal ridges and tubercles, and two shorter 



