121 



at the base; third and fifth toe of equal length; no subarti- 

 cular or metatarsal tubercles; the heel reaches the posterior 

 border of the eye. 



Upper parts smooth; a very fine, curved, glandular fold 

 above the tympanum; a few feebly prominent granules behind 

 the corner of the mouth; lower surface of body and thighs areolate. 



Middle of the back light greyish brown (dark orange-red 

 in life); a A-shaped spot in the lumbar region; a white spot 

 upon, and behind the tympanum; snout grey; loreal region 

 brown; a brown, triangular marking between the eyes; thighs 

 and sides of body greyish brown, speckled with brown; beneath 

 greyish, speckled with brown. Length 26,5 mm. 



Procoracoid connected with the scapula by a ligament only. 



Habitat: Aru islands. 



5. Microbatrachus Roux. 



(Roux, Abh. Senckenb. naturf. Ges., XXXIII, 1910, p, 228). 



Pupil horizontal. Tongue entire, extensively free behind. 

 Palate toothless. A smooth dermal ridge across the palate, in 

 front of the pharynx. Tympanum hidden. Fingers and toes 

 free; tips of fingers obtuse, of toes slightly dilated. 



Procoracoids present; clavicles and omosternum absent; 

 sternum narrow. 



Distribution: Aru islands. 



I. Microbatrachus pusillus Roux. 



Microbatrachus pusillus Roux, Abh. Senckenb. naturf. Ges., XXXIII, 1910, 

 p. 228, pi. XIV, figs. 6— 6 b. 



Tongue large, subtriangular, about half free behind. Head 

 nearly as long as broad ; snout broadly truncated, as long as 

 the eye; no canthus rostralis; nostril in the middle between 

 the orbit and the tip of the snout; interorbital space 173 times 

 the width of the upper eyelid ; tympanum hidden. Fingers 

 obtuse; second to fifth toe with very feebly dilated tips; 

 fingers very short, first shorter than second, which is shorter 

 than fourth; toes short, first shorter than second, third longer 

 than fifth; no subarticular or metatarsal tubercles; the heel 

 reaches the posterior border of the eye. 



Skin smooth. 



Upper parts brown, darker on the head and the anterior 



