AMPHIBIANS AND REPTILES. 95 
insertion of hind limb. Arm well developed, and. hand much 
shorter than fore arm. Fingers 4, large, rather slender, de- 
pressed above somewhat, especially basally where broader, and 
surfaces all rounded convexly. A thickened web between bases 
of fingers very narrowly. Palmar tubercles 2, one about center 
of palm and other at base of first finger. Also a third obsolete 
palmar tubercle external and close to median one. No distinct 
tubercles on under surfaces of fingers though tips of each de- 
veloped as one. ‘Third finger longest, more slender than others, 
and about 3 in rest of arm to shoulder. First finger next in size, 
broader. Second finger still shorter than first or a trifle longer 
than fourth which is about half length of third. On inner and 
upper faces of 2 inner fingers a blackish and callous thickening 
of epidermis. Hind limb strong, heel of extended hind leg 
reaching to posterior edge of tympanum, femoral region about 
equals tibial, and space between tip of fourth toe and heel but a 
little greater than rest of limb measured to groin, though about 
of same length as space from outstretched heel to vent. ‘Toes 
all depressed and covered with thick skin, which also forms 
thick uniting web. Fourth, toe longest, and measured from base 
about 3% in space to groin. Fifth or outer toe about 2% in 
fourth, and connected by web extending from outer phalange to 
front margin of second or subterminal phalange of fourth toe. 
Other toes all graduated down from fourth t6e to first, which 1s 
much .shortest, and also all united by a broad terminal web, all 
united to last phalange except that of fourth toe, where unison is 
subterminal. Sole of foot perfectly smooth except an elongate 
horny wedge-like keel, blackish in color, with a sharp horny edge, 
and placed at base of inner toe. Also a trace of same is seen on 
inner edge of tip of inner toe. ‘Tips of toes rounded though: 
scarcely tuberculous. Color in alcohol dull brownish above. 
Head gray-brown above, as on upper surface of snout and inter- 
orbital space. Edge of upper jaw broadly pale brown. From 
behind each eye, very slightly convergent at first, a pale brownish 
streak runs back towards coccyx where it converges. At their 
convergence they form a sort of expanded pale brownish area. 
Sides of trunk above deep dusky-brown obscurely mottled with 
darker and paler. Lower surface of body pale brownish-white. 
