of the Rhinoloplius philippiiieiisis Group. 2')5 



broadly rounded oflP^ almost trunca'^ed ; the same connect'ng- 

 l)rocesS ; the same laucet — peculiarly long, narrow, cuueute ; 

 the same size and shape of the horseshoe; the enorm)usly 

 enlarged ears — proportionately of the same size as in ackiUes 

 and essentially of the same shape; the same ratio between 

 the metacarpals (third metacarpal not shortened). But the 

 distal phalanges are much lengthened * ; the lateral mjutal 

 grooves are obliterated (as in Rk. mitratus) ; and. the general 

 size of the animal is much increased. The dentition of 

 Rh Maclaudi is more highly developed than in p/iUijjpine/nis 

 and achilles, and on the same level as in the sedalus and tr'i- 

 foliutas section — p^ in the tooth-row, very small, the inter- 

 space between the canine and p^ narrow f- The skull is 

 unknown. — In short : Rh. Maclaudi is an Ethiopian oftshoot 

 of the pliilippinensis-ty])e, more highly developed than that 

 species at least in the dendtiou, the wing-structure, and tlie 

 mental grooves. 



The bats of the sedulus section have retained, in all 

 important respects, the crani.J characters of philippiaeasis 

 and achilles. But the postnasal depression is deeply hollowed 

 out (as in the trifoliutus type), and externally, i. e. in the 

 nose-leaves (wing-like expansions of the sella), in the wing- 

 structure, in the mental grooves (one only), and in the more 

 pointed ears, they are like trifoliatus and luctus. Two 

 species only are known — Rh, sedulus from N. Borneo and 

 the Malay Peninsula, and Rh. laiwsus from. S. China. 



The series of evolution culminates in the trifoliucus section : 

 also the skull is modihed. The six species known are 

 distributed from N. Borneo to S. India, from Banka aud 

 Java to the Himalayas. 



* 111 the trifoliatus section the lengtheuiug of III.^ (as pointed out 

 above) has involved a lengthening of UI.^ lu pruxinud direction, and 

 Ciiute.^uently a shortening of tiie metacarpal. In Rh. Maclaudi the 

 lengthening of HI." has involved a lengthening of III.' in distal direc- 

 tion ; consequently the metacarpal retains its original length. The great 

 increase in the total length of the third linger resulting herefrom seems 

 to have been counterbalanced by a lengthening also of the lirst phalanx 

 of the other (fourth and tifth) fingers. These remarks are based on 

 I'ousargues's measurements of the third and tifth lingers (those of the 

 fourth linger are unknownj. 



t I am indebted to M. A. Mt^n^gaux, Paris Museum, for the above 

 details on the dentition of Rh. Maclaudi^ as well as for the following 

 information : — " M. de Pousargues s'est trompe eu disant qu'il y a uu 

 espaco entre la canine superieure et \a. p'^ [/>^ in this paper] ; a leur base 

 la premiere premolaire \_p'^ touche eu avaut la canine, eu arriere la p^ 

 [p^]." By this important correction the dentition of Rh. Maclaudi is 

 siiown to be perfectly in accordance with the usual scheme in the 

 present group. 



