nilROPTI'R.W Vf)TKS / 



tcoi'bital width 1>.S-I() nun.; teclli lai'^v: luaxillary row ahoul \o mm. 

 External dimensions lar^-e: forearm (Sii. <S -'.)(). o mm., third meta- 

 carpal r)4.7-()0.!2 mm. 



H. d. masoiii comes very near to H. d. diadema from .lava 

 and Timor, from wdiich it differs only in the rather heavier skull, 

 broader face and larger nose-leaves. Tlie two races can only l)e 

 discriminated by average characters. 



My reasons for identifying this peninsular race of H. diadema 

 with « Ph. inafioni » — hitherto known from a single specimen, 

 obtained at Moulmein, Tenasserim, and preserved in the Calcutta 

 Museum — are these : — According to Dobson , who at first 

 (187^) regarded Ph. masoni as a quite distinct species, it differs 

 from H. diadema in two respects: — « The concave front surface 

 of the base of the transverse nose-leaf is divided into two cells 

 only by a single central longitudinal fold »; and « from the under 

 surface of the symphisis of the mandible a small conical l)ony 

 })rocess projects downwards, about e(|ual to the lower canine tooth 

 in vertical extent ». Later on (187(1) Dobson put Ph. masoni 

 down as a subspecies of Ph. diadema; and finally, in 1878, 

 he was evidently inclined to (consider it an individual variety 

 only. 



Dobson was probably right in regarding the two characters 

 on which he originally based Ph. masoni as individual aberrations. 

 In H. diadema there are generally three vertical ridges on the 

 front face of the posterior leaf, ])ut the two lateral ridges are 

 always less prominent than the central ridge , and in some speci- 

 mens (irrespective of racial differences) they ai^ so much reduced 

 as to be rather indistinct; the type of Ph. masoni is i)robably 

 an individual of this kind. As to the downwards projecting btmy 

 process from the symphysis of the mandible, I tiiink there can 

 Ite no doubt that this is a mere individual deformity. Hut when 

 leaving these two « characters » out of consideration, the whole 

 original descri})tion of Ph. masoni is reduced to the following 

 three facts: it is a bat of the //. diadema type, of large size 

 (forearm, according to Do})soii, 8o mm.), and inhabiting Tenasserim 

 and neighbourhood; in other words: it is the peninsular race of 

 H. diadem,a. 



The example obtained 1)y Leonardo Fea is practically a topo- 

 type of Ph. masoni, Meetan Ixnng situated close east of Moulmein. 



