498 On the Species of tJie Genus Hhiuopoma. 



F. microphyJlum and Hardwickei. Sides of top of muzzle 

 thickened and rounded, but not inflated. Sagittal crest very 

 high in the frontal region. 



Dimensions of the type (measured in spirit) : — 



Forearm 72 millim. (in another specimen 70). 



Head and body 73; tail 65; ear 20; connecting band, 

 height beliind in centre 3 ; third finger^ metacarpus 52, Ist 

 phalanx 10, 2nd phalanx 19 ; fifth finger, metacarpus 47. 

 1st phalanx 10, 2nd phalanx 10 ; lower leg and hind foot 

 (s. u.) 40-5. 



Skull : greatest length 21-2 ; basal length lS-2 ; occipito- 

 nasal length 18-6; zygomatic breadth 12-8; breadth of brain- 

 case 9'2 ; front of canine to back of m^ 8. 



Bab. Balighe, Lake Toba, N.W. Sumatra. 



Ti/jie. Old male. B.M. no. 0. 8. 2. 17. Collected by 

 Dr. E. Modigliani, and presented by the Museo Civico, 

 Getioa. 



This is the largest species of the genus, and difi"er3 from 

 the Indian R. Hardiciclcei not only in size but in the non- 

 inflation of its nasal prominences. 



Uhinopoma muscatellum^ sp. u. 



Allied to R. cystops, but rather smaller, with larger bulla3 

 and smaller teeth. 



Size rather less than in R. ct/stojys, therefore the smallest 

 member of the genus. Ears large, thin, with a high con- 

 necting band. External characters generally as in cystops. 



Skull small, slender, and delicate, almost or quite without 

 sagittal crest. Its anterior portion narrower than in cystops 

 and more parallel-sided, so that the outline as seen from 

 above runs backwards and then abruptly turns outwards at 

 the z^^gomata; in cystojjs ^nd other species the general out- 

 line diverges evenly to the broadest point of the zygomata. 

 Kasal prominences large, thin, inflated, projecting forward 

 decidedly in front of the anterior end of the middle line of 

 the nasals. Supraorbital edges scarcely ridged. Brain-case 

 small, low, its walls unusually thin and translucent. Hinder 

 edge of the palate distinctly behind the level of the last 

 molar. Bullse conspicuously larger than in the allied forms. 

 Teeth very small, both above and below, the lower molars 

 noticeably less high-crowned than usual; lower incisors thin 

 and barely touching one another instead of being pressed 

 closely together ; anterior lower premolar barely half the 

 height of the posterior. 



