76 REPTILES. 



muzzle, rounded in front ; loreal region concave ; nostril prominent, 

 oval, partly on the canthus rostralis, near the end of muzzle ; eye 

 very large ; tympanum small, circular, about one-fifth of eye. Skin 

 of the upper parts covered with veiy small granular tubercles ; throat, 

 chest, and imder side of legs smooth ; belly granular. Fingers 

 slender, with broad elliptic disks and small subarticular tubercles, 

 quite free ; foiurth longer than second, first with a thick swelling at 

 the inner side. Toes moderate, with moderate disks and small sub- 

 articular tubercles, so broadly webbed that a part of the disks is in 

 contact with the membraaie ; the fifth toe is hardly longer than the 

 third, and reaches to the penultimate phalanx of the fourth ; at 

 the base of the first toe a very small tubercle. Cleft of mouth large ; 

 palate between the eyes very narrow, with a groove on each side ; 

 inner nostrils and eustachian tubes moderate ; tongue elongate, 

 broader, free and deeply notched behind. In the males on each side 

 of the tongue near the angle of mouth, a moderate slit for the ex- 

 ternal vocal sacs, situated beneath the angle of mouth. Sacral ver- 

 tebra not dilated. Length of body 1|-" ; length of hinder extremity 

 3" ; length of front extremity l-i" ; length of foiuth toe -|" ; length 

 of third finger -I". 



6. Ixalns guttatus, (Plate IV. fig. D.) 



Disks of fingers rather large, toes entirely webbed ; upper parts 

 thickly covered with granular tubercles ; muzzle rather elongate, 

 pointed ; brown above, with large dark brown spots. 



«. Adult male. Borneo. From Mr. Lowe's Collection. 



Descriiption of the specimen. — Similar to the preceding species. 

 Habit slender ; head elongate, mth rather convex crown and flat 

 forehead ; canthus rostralis angular, loreal region concave ; muzzle 

 prominent, with a rounded upper edge, and obliquely truncated in 

 front ; nostril prominent, oval, partly on the canthus rostralis, near 

 the end of muzzle ; eye vexy large ; tympanum small, circular, about 

 one-fifth of eye. Skin of the upper parts thickly covered with rather 

 prominent tubercles, rather larger on the sides ; throat, chest and 

 under side of legs quite smooth, belly finelygranular. Fingers slender, 

 quite free, with large broad elliptical disks ; fourth finger longer than 

 second ; first with a thick swelling at the inner side. Toes moderate, 

 with moderate disks and small subax'ticular tubercles, as broadly 

 webbed as in the preceding species ; fifth toe cons]3icuously longer than 

 thii'd, reaching a little beyond the base of the penultimate phalanx of 

 the fourth ; metatarsus with two veiy small tubercles. Cleft of mouth 

 large, longer than broad ; palate between the eyes very narrow, with 

 a groove on each side ; inner nostrils and eustachian tubes moderate ; 

 tongue elongate, broader, free and deeply notched behind. Brown 

 above, with large rounded, sometimes confluent, dark bro-s\Ti spots ; 

 legs with dai'ker cross-bands ; hinder sides blackish brown, with a 

 few lighter small spots ; web between the toes black. Length of 

 body li" ; length of anterior extremity |-" ; length of posterior 

 extremity 2i". 



