174 PTEROrUS YAPENSIS. 



A young female (not full-grown, skin, 74.10.5.9) differs conspi- 

 cuously from the type in colour. Back and rump blackish thickly 

 mixed with shiny silvery grey hairs or tips to the haii-s. — Breast, 

 belly, and flanks blackish seal-brown heavily sprinkled with shiny 

 silvery grey. — Mantle pale buffy cinnamon, shading into deep mars- 

 brown on sides of neck, and into dark chocolate on foreneck ; base 

 of hairs everywhere blackish. — Crown darker than mantle and 

 sprinkled with glossy silvery grey ; colour gradually darlicniug on 

 sides of head into the blackish seal-brown of throat. 



It appears probable (judging from allied species) that the differ- 

 ence in the colour of the base of the fur of the mantle (yellowish 

 buff like tips of hairs in the above-described male, blackish in female) 

 is not dependent on age, but sexual. The hairs of the mantle 

 are rather rigid in the single male examined, soft and spreading in 

 the single female. 



Measurements. On pp. 175, 176. 



Specimens examined. Two, as registered below. 



Range. Pelew Islands. 



Type in collection. 



a. cJ ad. skin ; skull. Pelew Is. ; 1870 (Crt/'C. Godeffroy Miiseiim. 74.10.5.8. 



Heinsohn). (.Type of species.) 



h. 5 jun. skin ; skull. Pelew Is. ; 1870 (C'ajo;'. Gocleffroj Museum. 74.10.5.9. 



Heinsohn). 



18. Pteropus yapensis, K. And. 

 Pteropus keraudreni (pt.), Dobson, Cat. Chir. B. M. p. 63. 



Pteropus keraudreni (nee Pt. keraudren, Q. S,- G.), Tetens *.§• Kubanj, 



Journ. Mus. Godeffroy, i. pt. ii. p. 50 (122) (1873 : Yap). 

 Pteropus keraudreni, var. a (pt.), Dohson, Cut. Chir. B. M. p. 65 



(1878 : Yap ; Macltenzie). Var. aa (pt.), Trotiessart, Rev. ^- Mag. 



Zool. (3) vi. p. 203 (1879 : Mackenzie). 

 Pteropus iusularis {}^t.,ncc Homhr. ^-Jacq.), Trouessart, Cat. Mamm. 



i. p. 83(1897: Yap; Mackenzie). 

 Pteropus (Spectrum) mariannus (pt., nee Desm.), Matschie, Meya- 



chir. p. 27 (excl. figs.) (1899: Yap; Mackenzie); Trotiessart, 



Cat. Mamm., Suppl. p. 53 (1904 : Yap ; Mackenzie). 

 Pteropus yapensis. A'. Andersen, Ann. 4- May. N. H. (8) ii. p. 365 



(1 Oct. 1908 : Yap ; Mackenzie). 



Diagnosis. -i'>\ixi.\\d,v to Pt. admiraliioium, but somewhat larger, 

 with broader skull, smaller orbits, more strongly developed posterior 

 ledo-es of cheek-teeth, longer ears, and shorter fur. Blackish above 

 and beneath, sprinkled with whitish ; mantle and sides of neck 

 strongly contrasting, yellowish buff ; foreneck washed with russet. 

 Forearm about 130 mm. Hah. W. Carolines. 



Skull and teeth. — Size of skull as in Pt. admiralitatum, if not 

 slightly larger, but temporal fossa much broader, zygomatic arches 

 therefore much more flaring posteriorly, sagittal crest stronger, 

 frontal region between orbits broader, orbits smaller; zygomatic 

 width about 3(5 ram., against 32-33 in Pt. admiralitatum ; orbital 



