10 U.S. NATIONAL MUSEUM BULLETIN 2 88 



webbed, third toe longest, second a little shorter than fifth; a small 

 blunt, oval inner metatarsal tubercle, but no outer one; no tarsal 

 ridge; skin baggy on heel and knee without forming folds. Body very 

 stout, in postaxillary region over 1% times the greatest width of head. 

 When hind leg is adpressed, heel barely reaches axilla; 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 separated. Loose 

 skin of body covers basal parts of legs and arms. Skin of upper parts 

 finely pustular, with scattered glandular tubercles and short gland- 

 ular ridges above eye and on neck and body; angle of jaw with 

 a small pointed skin projection, but no projection on tip of snout; 

 venter pustular, more coarsely so on posterior abdomen and legs; 

 a heavy glandular ridge above anus and two rounded projections 

 below it; a short, indistinct glandular ridge from posterior corner of 

 eye, ending behind the depression above angle of mouth; no skinfold 

 across chest; no ventral disk; no external vocal sacs. 



Dimensions — Head and body, 89 mm.; head length, 20 mm.; head 

 width, 27.5 mm.; femur, 34.5 mm.; tibia, 31 mm.; foot to end of 

 third toe, 35.5 mm. ; hand, to end of third finger, 13 mm. 



Color in alcohol — Dorsum plumbeous, lightening to drab-gray on 

 the sides and on legs, with small pale spots wherever the skin glands 

 occur; venter very light gray with a dense scattering of darker gray 

 dots, the chin darker, and a few small black spots on center of throat 

 and belly and along front of shoulder and forearm; side of head and 

 body smoke gray, with a slate-gray line from tip of snout below 

 canthus to eye, becoming darker below eye, and lightening and 

 suffusing benind it; a small round drab-gray spot immediately behind 

 eye; tubercles above eye and on sides of neck pearl gray; posterior 

 femur slate-gray with lighter tips on the numerous granules and 

 rows of tubercles there; palms of hands and soles of feet clove brown, 

 the webs between the toes mottled with drab. 



Remarks — The example from Leticia, the only specimen examined, 

 agrees well with Muller's description of the type, except that it is 

 larger. More material of this interesting form should be sought in 

 order to estimate its variation, occurrence, and life history. 



Pipa pipa (Linnaeus) 



Plate 1d-f 



1758. Rana pipa Linnaeus, p. 210 (type locality, Surinam). — Gmelin, 1789, 



p. 1046, no. 1.— Shaw, 1802, p. 167, pis. 50, 51.— Andersson, 1900, 



p. 20.— Dunn, 1948, p. 9. 

 1768. Pipa americana Laurenti, p. 25 (type locality, Surinam). — Dumeril 



and Bibron, 1841, p. 773, pi. 92, fig. 2.— Wyman, 1854, p. 369, figs. 



1-5. — Gimther, 1858, p. 3. — Steindachner, 1867, p. 6. — Boulenger, 



