412 ACERODOX. 



5. ACERODON, JourJan. 



Fieropus (pt.), Dobson, Cat. Chir. B. M. p. i-"). 



Type. 

 iS3?. AiHTodon, Jourda?2, IjEvho du Monde Suranf, iv. 



no. -276, p. 156 (14 Oct. 18;'.7) A. jubatus. 



PtTopus (pt.), Temminck, Mon. Mamm. ii. pp. 59, 69 (1837); 

 Wagner, Schreher's Sdu(/., linppl. i. p. ;U4, footuote (18-j9: 

 . icerodon " hijchsteus eiiie Unterg-attiing voii Pferopus ") ; Lesson, 

 y. Tahl. B. An., Mcumh. p. 13. no. 174 (1S4l^); Gray, Zool. 

 ' Sanmram/,' Vert. p. 11 (1849); Waijuer, ^'Schreher's Sdvg., 

 Suppl. V. "pp. 595, 597 (1853-55) ; Peters, MB. Akad. Berlin, 

 18H7, p. 332; Gray, Cat. Monk. ^c. pp. 105, 110 (1870); 

 l)obson,l.s.c.{'\&~S). 



Acerodon, F. Citrier, C. R. Ac. Sci. Paris, \\. uo. 1, p. 3 (Jan. 1838 : 

 critical remariis ou el aracters friven bj^ Jourdan) ; id., Ann. Sa. 

 '■' Nat. {2) Zool. viii. p. 369 (published later than 5 Feb. 1838: 

 essentially a reprint of foregoinsj). 



Acerodon, Lesson, N. Tahl. B. An , Mnmm. p. 14 (pt.) (1842 : two 

 species, "A. vaiiikorensis" \^ = Pteropus ranikorensis -\- Pt. tuher- 

 ciilaius'] and A. jubatus; A. vtackloti -placed in the preniis Iferopus) ; 

 lleude, Mem. Hist. Nat. Enip. C/iin. iii. p. 177, pi. v. titrs. 10-12 

 (teeth) (18H6: dental characters); Matschie, Megwhir. p. 9 

 (pt.) (1899 : subgenus of Pterojms; iive forms, one of which, 

 " .4. hatcJiianus,'" is however a Pteroptis fcaniceps']) ; Miller, 

 Fain. Si' Gen. Bofx, p. 59 (1907: cbaruciers} ; K. Andersen, 

 Ann. ^ Mag. N. IF (8) iii. p. 20 (Jan. 1909 : characters ; date of 

 technical name ; revision of species). 



Z'tar/jtosis.— Similar to Pteropus, but p^ and m\ in certain species 

 also p'' and Pj, with a well ditfereutiated antero-internal tubercle, 

 and Pj, m^, and in^ with a sharply delined inner basal ledge. Fore- 

 arm iyO-205 mm. 



fSJcidl (tig. 2U). — Typical Pteropine. Occiput distinctly tubular. 

 Length of rostrum (front of orbit to tip of nasals) much more than 

 lachrvmal breadth ; front margin of orbit vertically above back of 

 p* or inter^pace p^-m^- Tympanic narrow, annular. Premaxillic 

 in simple contact anteriorly, very similar in shape to those of 

 Pteropus, breadth at upper extremity subequal to breadth at alveolar 

 l)order. Deflection of brain-case moderate, the alveolar line pro- 

 jected backward passing through upper part of occipital condyle. 

 Postorbital processes strong, sometimes nearly or quite encircling 

 orbit ; corresponding processes from zygoma always present. 

 Sagittal crest always well developed, extending forward nearly 

 to base of postorbital processes. Coronoid process broad, rather 

 steeply ascending ; coronoid height of mandible less than c-m^ ; 

 condyles considerably above alveolar line. 



Dentition (fig. 20). — Dental formula as in Fteropus, viz. : 



i 'i'cp'p''p m' m- x2 = :^4*. p' rudimentary, generally early 



i,i,cp,P3P4m,m3ni3 , , , , 

 deciauous ; p,, m^, and m^ much reduced. 



* Only anomaly observed, in 30 skulls, representing all forms of Acerod,on 

 known : p^ entirely wanting on one side, present on the other, A celebensif, 

 (S ad., teeth slightly worn : Luwu, Celebes, B.M. 94.7.4.2. 



