420 uillktin: muskim of c (impauativk zoology. 



by a loose flap of skin. Dijiits free, stout, slightly dilatod at the tips; the first 

 and .seeoiid fingers equal in lenntii and only a trifle shorter than the fourth; the 

 elbow exteiuled forward rea<"hes the posterior edge of the orbit. Toes fully 

 webbed, but the webs so fully noteheil that they apjx'ar only half webbed; a 

 free border of skin on the inner side of the tarsus and another on the outer side 

 of fourth too; subarticular tubercles slightly developed; a distinct inner and a 

 low outer metatarsal tubercle; heels nearly in contact when the hind limbs 

 are folded at right angles to the axis of the body; the tibiotarsal articulation 

 reaches about two millimeters behind the posterior edge of the orbit when 

 the hind liml)s are carried forward along the bodj'. Skin smooth except for a 

 few low tulierdes on the heatl and shoulders, the tuben'les most abundant in 

 the occipital region; clusters of horny spines, characteristic of the male in the 

 breeding season, grouped on the chest and outer side of thumb; a well-de- 

 veloped supratympanic fold which extends to the groin; two transverse folds 

 and a number of flat tubercles just posterior to the angle of the mouth; several 

 folds on the sides of the body; two loose flaps of skin extending the length of 

 the posterior side of the thighs. 



Color above dark brown indistinctly mottled and spotted with darker brown, 

 color below uniform yellowish grey. 



DimeriMons. 



Tip of snout to vent 4(5 mm. 



Tip of .snout to posterior end of mandibular bone 16 " 



Greatest width of head 15.5 " 



Fore leg to tip of longest finger 28 " 



Hind leg to tip of longest toe 64 " 



RrmarLs. Cope says in the type description: — "Labial integument 

 largely free and overhanging the lower jaw." We have examined 

 carefully the five paratypes (Acad. nat. sci. Phil. 1,435-1,457, 16,177, 

 16,178) and it is certain that the labial integument of the type-speci- 

 men has iieen artificially torn away from the skull. The paratypes 

 are much better preserved than the type and the labial integument 

 of each one is normal. The labial integument is likewise attached 

 to the skull, normally, of course, in the ten specimens, nine from 

 Vincocaya and one from Arequipa (M. C. Z.). 



Telmatobius jelskii (Peters). 



Pseitdohatrachus jelskii Peters, Monatsb. Berl. akad., 1873, p. 415. 

 Cyclorhamphus marmoratus Giinther, P. Z. 8. London, 1859, p. 89. 

 Telmatobius jelskii Boulenger, Cat. Batr. Sal. Brit, mus., 1882, p. 191. 



