( 5(12 ) 



upper eyolkl. Tymp<anum indistinct, not half tlie area of the eye. Fingers and toes 

 of moderate length. The .second finger very little longer than the first ; the third 

 longest. Toes not webbed. Tips of fingers and toes blunt ; subarticular tubercles 

 indistinct ; one flat elongate inner metatarsal tubercle. The distance between vent 

 and tibio-tar.sal articulation equals, or may even exceed, the length of the bod v. Skin 

 of the back with very small flat indistinct granulations: lower parts (juite smooth. 



Upper parts brownish oli\e, uniform or marbled with brown ; upper lip black, 

 with some white spots ; a black band from the eye over the tympanum to the shoulder. 

 Sides of the l)ody with larger or smaller black spots. Hindlinibs with brownish 

 cross-bars. 



Length of body (adult female), 1!) mm. 



Length of hind-limb, 30 mm. 



Distance of heel from tip of longest toe, 8 mm. 



The exact and normal form of the pupil (said to be erect in this genus) cannot 

 be ascertained. In one specimen it is distinctly horizontal ; in another it is produced 

 upwards into an angle. 



The specimens are from Great Natuna. 



I consider this species a dwai'f (insular) form of Li'ptobrachiimi (jracile ((ithr.) 

 from North Borneo, which is a much larger and more strongly developed species ; in 

 fact, it will be very difficult to distinguish young specimens of the latter from 

 L. nakvnae. 



Only one species of Frog was collected in Sirhassen — viz. Pedoatibes guentheri, a 

 Bornean form. Two of the Xatuna species seem to he new. Of the remaining twelve 

 species one only is Bornean, and two belong to the Malayan Fauna, the remainder 

 having a more or less wide geographical range. 



