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. 



1. 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 1 2 / 3 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 



