f'TN'OPTEUrS BRACHTOTIS BHACHTOTIS. 



617 



Cut. Mamm. i. p. 86, d. 461 (1897) ; Miller, Proc. Wash. Ac. Sci. 



iii. p. lo? (1901 : Sirhassen) ; id., Proc. U.S. Nat. Mus. xxxi. 



p. 274 (pt.) (1906 : Ilhio-Linga Arch.) ; Kloss, J. Fed. Mai. St. 



Mus. ii. p. 153 (1!108) ; Lyon, Proc. U.S. Nat. Mus. xxxvi. 



p. 487 (1909 : Rliio-Linpa Arcli.) ; T/ioinas S,- Wrov.ghton, J. Fed. 



Mai St. Mm. iv. p. 108 (1909: Si Ivaiang & Tanjong Surat, 



S.E. Johoie ; Tanjong Tiirut, Batam ; Pemeral, Karimon). 

 Cynoptenis sphinx 7. nuuitani, Matschie, Megachir. p. 75 (pt.) (1899). 



f. niontanoi. Prowssart, Cat. Alatmn., Siippl. p. 62 (pt.) (1904). 

 Cvnopterus sphinx {nee Valil), Bvnhotc, P. Z. S. 1900, p. 87o (1901 : 



Kikalin, IJamnn ; Eiserat, Jalor) ; id., Fasc. Mai., Zool. i. p. 14 



(pt.) (1003: liiserat ; habits); Miller, Fain. &,- Gen. Hats, ■^. AS, 



iig. 5 (skull) (1907); Elliot, Cat. Mamm. Field Col. Mus. 



p. 49.3, n. 869 (pt.) (1907 : Sarawak), 



Differential diameters. — Similar to C. h. anguJatus, but averaging 

 considerably smaller (forearm 57-60 mm. ; compare table, p. tJi2), 

 and colour of fur averaging brighter. 



This is the onl}- form of Cynopterus known to occur in Borneo, 

 the Philipjiines, and Celebes ; and all the specimens (50) examined 

 from those islands are in every respect typical C. b. brachyotis. In 

 the Malay Peninsula (at least as far north as Trong, LoM'er Siam) 

 and Sumatra it occurs together with O. b. anr/ulatus ; of 75 specimens 

 examined from that area, "21 are C. b. anijulatus, 50 C. b. brnchyotis, 

 while four (about 5 per cent.) are so thoroughly intermediate as to 

 be impossible to allocate to subspecies (see list of specimens, p. 622). 

 One of these intermediate specimens might with equal right be con- 

 pidered a very large braclujotis or an unusually small angulatus, but 

 is not necessarily a hybrid between the two forms ; the other three 

 are in the size of the skull and teeth perfectly within the limits of 

 brachyotis, but externally indistinguishable from average specimens 

 of angulatus (one of them even equal in size to a rather large 

 angtdat\i.s : forearm 70 mm.) ; facts which would seem to support the 

 supposition that the two races occasionally interbreed. Anything 

 similar to or closely approaching these intermediate specimens is so 

 far unknown from localities inhabited exclusively by the one or the 

 other race. 



There is apparently no difference whatever between specimens 

 from the Mala}- Peninsula, Sumatra, Borneo, Philippines, and 

 Celebes. Subjoined a comparative list of measurements : — 



Lower Siam, 



Malay Pen., 



Sumatra. 



36 stalls, 



37 specim. 



Skull, lambda to gnathion ... 27-2-30-6 



,, coadylo- basal lengtli . . 2.')'8-29-2 



,, rostrum 6 - 73 



„ across m'-m', crowns. 7'7- 9'2 



Mandible 20-2-22-8 



c-mS crowns 8-8-10-2 



Forearm .">7 -G5'5 



Third metacarpal 355-42 



Ear from orifice lb -17 



Tibia 21-5-24-5 



Borneo. Philippines. Celebes. 



24 skulls, 

 31 specim. 



27 -30-7 



25&-29-5 



6 - 7-4 



7-7- 9-2 



20-5-22-7 



9 -10-4 



58 -66 



37-5-42-5 



15 -17 



21 -25-5 



3 skulls, 

 5 specim. 

 29 -30 

 27-2-28-5 



f.-6- 7 



8-.5- 8-9 

 21-3-21 -8 



9-5- 9-8 

 62 -64 

 410-42-5 

 15 -16 

 22 -23-5 



2 skulls, 

 2 specim. 

 28 -28-8 mm. 

 27-0-27-8 



6-8- 6-8 



8 - 8-5 

 21 -8-21 -8 



9 - 9-8 

 60 -63-5 

 o9 -42 



•Vo 



