NO. 1472. MAMMALS OF ENGANO— MILLER. 823 



Skull and teeth. — The skull jind teeth resemble those of Pirvojms 

 lejjidus., difl'ering- merely iu their g-enerall}^ smaller size. Mandible 

 noticably more slender than in the related species. 



Medsureinents. — For external measurements se(> table, pao-e 824. 

 Cranial measurements of type: upper length, (31.2 nun.; condylobasal 

 length, »)0; basilar length, .5.5; median palate length, 3o.«); palatal 

 breadth between anterior molars, 12; zygomatie l)readth, ?A\ least 

 interorbital breadth, S.-t; constriction behind postor])ital processes, 7.-i; 

 breadth between tips of postorljital processes, 25.fi; greatest breadth 

 of brain case above roots of zygomata, 22; greatest depth of brain case, 

 17; occipital depth, 11. S; depth of rostrum at middle of diastema, 7.8; 

 mandible, 48.8; maxillary tooth row exclusive of incisors (alveoli) 

 23.1; mandibular tooth row exclusive of incisors (alveoli). 2f).0. 



Spechnens examined. — Thirty-two from Engano, Pulo Dua, and 

 Pulo Mirbau. 



BeittarJi's. — The color phase represented in the t^^pe occurs in the 

 majority of the specimens. In some, however, the silvery hairs on 

 the back predominate so as to make the color a light gra3% while in 

 others the ochraceous-buff wash is so increased as to conceal the brown. 

 The gray phase and the buti' phase are connected with the normal dark 

 phase by intermediates of every degree, but the series of skins show 

 no direct intergradation between the two pale extremes. 



This animal appears to be not closely allied to Pteropus lepidm of 

 the South China Sea islands, but is readily distinguishable by its 

 smaller size and invariably light mantle. It is undoubtedly larger than 

 Ptei'opax JiypomeJaiius, the shortest forearm in the series measuring 

 122 mm., while that of the type of the Ternate species measures, accord- 

 ing to Dobson, 119 mm. 



PTEROPUS MODIGLIANII Thomas. 



1894. Pterophus modujUanii Thomas, Ann. Mus. Civ. di Stor. Nat. <li (^enova, 

 (2) XIV, p. 106. April 10, 1894. 



Twelve specimens were taken by Doctor Abbott, mostly on the 

 main island. Two are recorded by Thomas in the original description. 



In color the shins are very uniform, the only variation being a slight 

 tendency in some specimens for the rump and flanks to become suii'used 

 with dull ochraceous. While this species is rather closely related to 

 Pceropus nataUs, of Christmas Island, 1 fail to discovei- any strong 

 resemblance between it and the much larger, short-haired Pteropus 

 nlcoharicu^, to which it has been compared. 



Regarding the occurrence of the two species of Pteropus, Doctor 

 Abbott writes: 



''The rufous-naped species [enganus] was very common on Pulo Dua 

 and was generally found hanging and feeding on cocoanut trees. The 

 black one [^modigUanil] was not numerous on Pulo Dua. On the main 



