SYNOPSIS OF GENEUi. XClll 



l'. Occipital (sul)laiubdoid) region of 

 skull elongate, subtubular; no tail 

 (tifth metacai-pal nearly always 

 slijxlitly but distinctly longer than 

 third and fourth. [Pteropus sub- 

 section.] 



c^. Incibors | — ^, cheek-teeth g. 

 c\ rrenia.xilliB in simple contact in 

 frout ; io once and a half to .six 

 times the built of i,, upper canines 

 without secondary cusp (e.\cept in 

 I'feiopus tithe) culadts). 

 a'. No well-ditt'ereutiated antero-in- 



ternal tubercle in p' and m', no 



sharply delined inner basal ledge 



in p^, ni|, and m^ (^except in Pt. 



imetianits). [85 species, 103 forms: 



Malagasy, Oi-iental, Austro-Ma- 



liiyan, Australian, Polynesian ; 



one Ethiopian species.] 4, Pteropus, p. 61. 



l>\ A well-differentiated antero-in- 



ternal tubercle in p* and m' (some- 

 times also in p^ aiid -p^), a sharply 



defined inner basal ledge in p^, m„ 



and m„. [6 species, 9 forms : 



Philippines, W. Austro-Malaya.] o. Acerodun, p, 41:.'. 

 dK Premaxilla? co-ossified in front (in 

 adults) ; i, twelve to fifteen times 

 the bulk of i,, upper canines with 

 large external secondary cusp, 

 upper niolariform teeth with promi- 

 nent anterior and posterior basal 

 ledges, external main cusp of p^, 

 m,, and m^ distinctly bilobed. 

 [2 species : Solomon Islands.] .... 6. Pferalope.v, p. 432. 



2 2 -,5 



(P. Incisors j — ^ (i, lost), cheek-teeth j 



(nij lost). [1 species: Celebes.] .. 7. Styloctenium, -p. AA2, 

 U. Incisors j — j (i' and i, lost), lower ca- 

 nines at extremity of mandible, cheek- 

 teeth y (p^ lost); cranial rostrum at 

 least slightly, often considerably 

 shortened, premaxillae sublinear ; 

 second finger without claw, a short 

 tail, wings from spinal line, back 

 seemingly naked (the furred back 

 being covered by the naked wing- 

 membranes). [12 species, 13 forms: 



Austro-Malayan.] 8. Bobsonia, p. 448. 



b. Facial axis very little deflected against 

 basicranial axis : alveolar line, if pro- 

 jected backward, passing through lower 

 edge of occipital condyle or even some 

 distance below condyle (exceptions : 

 Plerotes and 82)h<trici»). 



