of the Rliinoloplius pliilippinensis Group. 247 



a considerable increase in the length of III.^ involves, there- 

 fore, an increase in the length of the phalanx which snpports 

 III.^, viz. Ill/, and this increase is effected not hj a 

 lengthening of III.^ in distal direction (which would make 

 an nnproportionately long third finger), but hy a lengthening 



cl3 

 ^3 





05- 



a. Forearm. f73, clA, do. Third, fourth, and fifth fingers in the philip- 

 jnnensis section. Q 3, 9 4, 5 o- The same fingers in the trifoUatus 

 section, reduced to the same length in proportion to the forearm. 

 Subdivisions of d and 9, in direction from left to right, indicate the 

 metacarpal, first and second phalanx. 



in j)roximaI direction, ?. e. by a removing backwards of the 

 joint between the third metacarpal and III.', which again 

 makes a shorter third metacarpal. 



(2) The seduhis section has the skull and the teeth 

 essentially as in philijyjmiensis, but the nose-leaves and the 

 wing^tructure as in trifoUatus. 



Only the species of the sedidus and trifoUatus sections 

 will be described below. 



1. Rhinolophus sedulus, sp. n. 



Diagnosis. — Cranial characters much as in Rh. philippin- 

 ensis, but postnasal depression considerably deeper. Nose- 

 leaves and wing-structure : the trifoUatus type. Forearm 

 43-5-49-2 mm. 



Skull. — Sagittal cre^t and maxillar width very much as in 

 philippinensis ; temporal fossa but slightly larger ; postnasal 

 dei^ression deeply hollowed out as in trifoUatus. 



Dentition (two skulls). — ^3 external; p2 and p^ almost or 

 quite in contact ; p^ in row, cusp so minute as to be scarcely 

 observable. 



Colour. — ? ad., Sarawak ; distal epiphyses of metacarpals 

 ossified ; teeth unworn ; skin : General impression a shade 

 of dark brown, slightly varied with greyish tips to the hairs. 



