riERorus MOLoiiSixrs. :.( / 



Palate -ridges (two specimens, Mortlock and Ponape). — 5 + 4 + 2. 

 Arrangement as in Pt. epularius (p. o93). 



Ears. — -Very short, narrow, almost concealed in the fur; when laid 

 forward covering about half the distance from ear to eye. Inner 

 margin flatly convex from base to tip; outer margin strongly 

 convex in lower two-thirds, almost straight (faintly convex) in 

 u|iper third ; tip subacute. Outer surface of conch covered with 

 rather long hairs except at extreme tip ; inner face with thiiilj' 

 spread shorter hairs (detectable only on close examination). 



Wings. — Membranes arising close together at sides of spine 

 (separated by an interspace of a few millimetres). 



Interfemoral. — Undeveloped in centre. 



Fur. — Rather long ; erect on mantle and shoulders, directed 

 backward but not adpressed (semierect) on back. Approximate 

 length, back and mantle 17, belly 15 mm. Least width of furred 

 area of back 36-39 mm. Tibia naked above. 



Colour. — Adult male (al., Ponape, teeth unworn; 82.10.27.6): 

 Back and rump vandyck-brown, everywhere slightly sprinkled 

 with silvery-white (or buffy-white) hairs; base of fur not differing. — 

 Entire underparts, from throat to interfemoral, including flanks, 

 similar to back, though somewhat washed with mars-brown in anal 

 region. — Mantle and sides of neck slightly deeper in colour than 

 back, between vandyck-brown and seal-brown, almost quite without 

 intermixture of pale hairs. On each side of neck, closely in front 

 of shoulder, a tuft of more rigid orange-buff unctuous hairs, tipped 

 with the same colour as the surrounding fur, therefore easily over- 

 looked when not searched for (sexual character). — Crown and sides 

 of head similar to mantle. Face (z. e. interocular space, region 

 round eyes, and sides of muzzle) conspicuously washed with 

 ochraceous. 



The individual variation in colour appears to bo small ; the 

 general tinge is sometimes more inclining to mars-brown, some- 

 times more approaching seal-brown ; the mantle is often precisely 

 similar to (not slightly darker than) the back ; the sprinkling with 

 pale hairs is never very strong, often rather inconspicuous. 



Sexual dijfferentiation. — Males with a tuft of rigid, brighter- 

 coloured glandular hairs on each side of neck ; in females these 

 tufts are entirely undeveloped or, occasionally, faintly indicated by 

 a slight ochraceous tinge of the hairs on the sides of the neck in 

 front of shoulders. Cauines slightly heavier in males than in females. 



Measurements. On pp. 278, 279. 



Specimens e.vamined. Nineteen, in the collections of the Leyden, 

 Berlin, U.S. National*, and British Museums; viz., one from 

 unknown locality (type of species), seventeen from Ponape, and one 

 from Mortlock (type of Pt. breviceps). 



Range. Caroline Islands : Mortlock, Ponape. 



Type in the Leyden Museum. 



Pteropits molossinns, Temminck ; 1853. — Based on one specimen 

 from unknown locality. The type is an adult male (teeth unworn), 



* Two J ad. skina with skulls, Ponnpe, 12 Feb. 1900; U.S. Bureau of 

 Fisheries; uos. 151558, 151559. 



