82 MR, K. ANDERSEN ON BATS [May IG, 



4. Rhinolophus NANUS, sp. n. (Plate III. fig. 3.) 



Rliinoloplius megwphyllus (iion Gray), var. /3 (partim), Dobson, 

 Cat. Chir. Brit. Mus. (1878) p. Ill (Goram). 



Diagnosis. Essential cranial characters as in Rh. truncatus, but 

 brain-case remarkably slender. Sella so slightly constricted as to 

 be practically parallel-margined. Small : forearm 43"3 mm. 



Details. This species marks a further step towards tlie celehensis- 

 horneensis type. Externally Rh. nanus is exceedingly like these 

 two species, but the skull is of the simplex type. 



The sella (compared with that of the foregoing three species) is 

 considerably reduced in breadth ; its width at the base is bvit very 

 little greater than at the summit ; the constriction at the middle 

 is much reduced (it requires some attention not to be overlooked) ; 

 and the whole of the sella therefore might very well be called 

 almost parallel- margined ; summit completely square-cut (there 

 Avill probably, in a large series, be some individual variation 

 in this respect). The horseshoe, too, is a little narrower. Lancet 

 almost cuneate, the lateral margins being but very slightly 

 concave. The size of the ears, both length and breadth, is reduced ; 

 the tip slightly more attenuated (less blunt than in Rh. simplex). 

 In the structui'e of the wings it stands exactly on the same level 

 as the foregoing species. 



Colour (one skin ; adult ; teeth almost quite unworn). — Fur 

 of the upper side uniform dull " mai^s-brown " ; base of hairs 

 slightly lighter ; under side very much of the same colour as the 

 upper side, but with a slight tinge of " drab." 



Skull, Postnasal depression and svipraorbital crests as in 

 Rh. simplex. Nasal swellings very narrow (4*9 mm.). Chief 

 character (compared with the three foregoing species) : the very 

 narrow brain- case (7 mm.). 



Dentition, p.^ quite external, and cingula of p., and p^ in contact 

 (a sufficiently large series will presumably show some vacillation 

 in the position of Pg). p- in the tooth-row ; its cvisp very small. 



Measureynents. On p. 84. 



Type. Ad. (skin). Goram Island. Collected by Dr. A. R. 

 Wallace. Brit. Mus. no. 61.12.11.10. 



Remarks. This species is readily distinguished from Rh. celehensis 

 and Rh. borneensis by the different shape of the facial portion of 

 the skull. 



Dobson regarded the specimen here described, together with 

 two others from IST. Celebes (Menado), as a variety (" j6 ") of 

 Rh. megajyhyllus, characterised chiefly by having " the summit of 

 the vertical process of the sella broadly rounded ofi", much 

 broader than the base." But, firstly, it should be remembered 

 that a sella, much broader at summit than at base, would be 

 exactly the reverse of what is found in megaphyllus ; it would 

 even be unique in the whole genus. Secondly, on resoftening 

 the nose-leaves I found the sella, in all the three specimens, quite 

 of the same general shape as in Rh. borneensis, i.e. practically^ 



