152 



close to the tip of the snout; interorbital space twice the width 

 of the upper eyehd. Fingers with large, truncated disks; disks 

 of toes small; first finger shorter than second ; fingers webbed 

 at the base; toes nearly entirely webbed, the web reaching 

 the disks, except that of the fourth toe; subarticular tubercles 

 present; no metatarsal tubercles; the heel reaches the tympanum. 



Upper parts with a few small, flat warts or almost entirely 

 smooth; a curved fold from the eye to the tympanum ; lower 

 surfaces wrinkled and with some tubercles or granules. 



Brown; upper parts indistinctly spotted with black; beneath 

 spotted with white. Length 23 mm. 



Two vocal sacs. 



Very different from the other species of Calliila by the 

 toothed palatine ridges, the webbed fingers, and the absence 

 of metatarsal tubercles. Probably a new genus ought to be 

 created for it. 



Habitat: Borneo (Pontianak). 



20. Microhyla Tschudi. 



(TscHUDi, Mem. Soc. Sc. nat. Neuchatel, II, 1839, p. 28, 71). 

 Hylaplesia (Boie) Schlegel, Isis, XX, 1827, p. 294 (part.). 

 Diplopeliiia Giinther, Cat. Batr. Sal. Brit. Mus., 1858, p. 50. 



Habit slender. Pupil circular. Tongue elliptic, entire and 

 free behind. Palate toothless. Palatine bones not forming ridges 

 across the palate ; one or two dermal ridges across the palate, 

 in front of the pharynx. Tympanum hidden. Fingers free, 

 toes free or more or less webbed, the tips usually more or 

 less dilated. Outer metatarsals united. 



No procoracoids, clavicles or omosternum. Terminal pha- 

 langes T-shaped. 



Tadpoles. — Eyes lateral. Spiraculum and vent median. 

 Tip of tail ending in a flagellum. Mouth terminal ; upper lip 

 absent or feebly developed; papillae and teeth absent. 



Distribution: south eastern Asia, including western part 

 of the Malay Archipelago. 



Synopsis of the Species. 



A. Toes free, the tips feebly dilated i. M. inoi-nata p. 153. 



B, Toes webbed at the base. 



I. Fingers and toes without disks 2. M. bti/igta-atza p. 154. 



II. Fingers and toes with disks. 



