126 PROCEEDINGS OF THE ACADEMY OF 



half palmate ; a free border on the inner side of the tarsus, and 

 outer side of outer toe. Skin smooth except a few small tubercles 

 on the occipital region. In the male there are numerous small 

 horny points on the breast, and a lai'ge horn^' plate on each thumb, 

 whose surface is roughened with crowded projecting points. 



Color olive-brown above, lighter brown below ; one specimen 

 has a few scattered yellow spots above. 



M. 



Length of head and body 048 



" of head to angle of mandible 012 



Width " at " " 018 



" " interorbital 004 



Length of fore limb . 025 



" of hind limb 008 



" of hind foot 032 



" of tarsus 012 



Two specimens from lake Titicaca. 



This species has a much less depressed head than the C. ma?-- 

 morafus, and probably a less developed auditory apparatus, and 

 vomerine tooth series. The coloration is entirelj^ different. The 

 C. fasciatus^ Peters, is equallj^ distinct, judging from the descrip- 

 tion. 



Hylodes sulcatus, sp. nov. 



Distinguished for its very wide head and rugose skin. The 

 form is stout, but the hind limbs rather elongate. The maxillary 

 borders are so expanded as to give the tympanic disks a partly 

 vertical exposure. These are vertically oval, the diameter a little 

 less than that of the orbit. The latter is a little less than the 

 length to the anterior nares. Choanoe large, but little larger than 

 the ostia pharyngea. Vomerine teeth in two short curved series 

 entirely behind the choanse, and not extending outwards beyond 

 their middle ; they approach nearly inwards. Tongue round, entire, 

 one-third free. Fingers very short without expansions. Heel of 

 extended hind limb to nares ; exjiansions of hind toes well marked, 

 with T-shaped phalanges. A peculiarity of the species is seen in 

 the strong ridge that extends along the superciliary border to the 

 posterior border of the cranium, inclosing a groove with its fellow. 

 Skin below areolate on the belly ; above with numerous short, 

 generally symmetrical folds, two of which cross the suprascapular 

 region, two on the sides, two on each side the back, etc. The 



