MAMMALS KROMVSIAM. 39 



But befoi'e giving any definite opinion I should like to see fresh 

 materia] from Palo Condor." — Knud Andersen. 



[Bats of the hi/pomelanus species are apparently strictly con- 

 fined to small islands, and do not occur on the mainland or on 

 large islands, however closely their homes may be situated to 

 such regions. 



The vamjyjirus species, on the other hand, is largely of con- 

 tinental habitat, or, if living on islands, the animals are of greater 

 size and more nearly related to the mainland forms than are those 

 of the hypomelanus species ; and except on one of the Natuna 

 Islands, representatives of the two species never seem to occur 

 side by side. — C. B. A'.] 



13. Pteropus vampvrus malaccensis K. And. 



1671. 2 juv. ; 1672. c^ ad.; 1673. J ad.; 1674. $ ad. Ivoh 

 Kut. 23rd December, 1914. 



1690. c? ad. Koh Kut. 24th December, 1914. 

 1732. Jsubad. ; 1748. d subad. Koh Kut. 26th December, 

 1914. 



"No. 1671 is not nearly full-grown. No. 1732 is perhaps 

 externall}^ full-sized, and the skull very nearly so. 



" In the four fidly adult specimens the forearm varies between 

 190-204 mm. (this lowers the minimum given in my Catalogue 

 by 5 mm., but it is easy to see that my material did not show the 

 real extremes in size ; the then available measurements of the 

 forearm were 195-209, but as the variation in length of forearm 

 in any species or subspecies of Pterojnis is usually at least ten per 

 cent., 190-209 comes probably nearer the true extremes) ; the 

 skull (total length) measures 77'5-81, the lower jaw (from 

 condyle) 60*5-64, and the maxillary tooth-row (crowns) 30-30-7. 

 " The six specimens are not peculiar in any respect. In colour 

 they exhibit no more variation than usual in Ft. v. onalacceusis, 

 i. e. a lighter, or deeper tinge of the mantle and head, and a 

 thinner or heavier admixture of gi'eyish hairs on back and under- 

 parts. 



"Z*^. V. 7nalaccensis was known to be generally distributed over 

 Sumatra, including Banka and the Linga Archipelago, and north- 

 wards through the Malay Peninsula to Jalor and Patani. The 

 present series extends its range across the Gulf of Siam to the 

 island of Koh Kut, off S.E. Siam. 



'•' Three years ago, in the new British Museum Catalogue 

 of Chiroptera (vol. i. p. 325, in the paragraph ' Differentiation 

 of sjDecies ') I hinted at the possibility that a completed material 

 might show a gradual transition from Ft. giganteus (' Pt. medius ' 

 of Dobson's Catalogue) to Pt, vampyrus (' Pt. edtdis '). But 

 time was not ripe then for any final conclusion on this subject, 

 and I preferred, in order not to prejudice matters, simply to 

 record the distinguishable forms under four headings : — 



"(1) Pt. giganteus {two races) from India and Ceylon, north 

 and north-east to Nepal, As^^i^^j '^^^^ Manipur — represented in the 



