S'rS PTl!EOPUS CHK1SAT7€HEN. 



I'teropus mysolensis, Gray, Cat. Monli. ^c. p. 105 (1870 ; Mysol ; 

 Ternate). 



Diagnosis. — Allied to Ft. alecto, but !-liull larger, with relatirely 

 heavier rostrum, stronger crests, greater zygomatic width, and 

 larger orbits; cheek-teeth much larger, canines anusually long. 

 Distribution and length of fur as in Pt. alecto. Head (as far liack 

 as ears), back, rump, and nnderparts blackisli ; occiput, mantle, 

 and sid€s of neck strongly contrasting yellowish buff; circum- 

 ocular region and sides of rostrum sometimes washed with paler 

 colour. Forearm about 17o-]80 mm. Hah. Giiolo group ; N.W. 

 New Guinea. 



/SA-wZ?.— General characters as in Pt. alecto, hut larger and more 

 heavily built : total length 74-79 mm., against 70-5-74 in 

 Pt. alecto, mandible 60-66, against b'yb-QQ, orbit 16-16*5, against 

 14-2-14-8. Kostrum coiisiderably broader, less compressed laterally; 

 lachrymal width of skull (across anterior orbital margins, at 

 base of lachrymal foramina) 17'2-18'2 mm., against 14-8-16'8 in 

 Pi. alecto ; Avidth across external surfaces of upper canines 16-17, 

 against 14-15. Sagittal crest well developed even in immatnre 

 individunls, in aged specimens unusually deep; postorbital pro- 

 cesses often reaching to within sliort distance of eorrespondiug 

 small processes on zygoma; base of postorbital ])rocesses very 

 strong, raised considerably above level of median frontul regioB, 

 making this latter deeply concave : zygomatic arches much flaring 

 posteriori}'. Heavy rostrum, strong development of crests, and 

 great zj-gomatic width, as compared with Pt. alecto, probably due 

 to much heavier dentition. Coronoid moderate, somewhat sloping; 

 coronoid height of mandible loss than c-m^ ; condyle considerably 

 above level of alveolar line of mandible. 



Teeth. — Upper canines unusnally long (from alveolar border to 

 tip 11-8- K5 mm., against 9-10 in Pt. alecto), heavy at base, crown 

 nearly straight; cingulum moderate, forming a well defined hut 

 narrow rim at inner and posterior base of crown; median longi- 

 tudinal ridge on lingual face of crown sharply projecting; vertical 

 groove on front face deep and broad. Lower canines very long, 

 slightly recurved ; cingulum narrow ; vertical groove on outer face 

 of crown deeper and more sharply defined than in Pt. alecto. Cheek- 

 teeth much longer than in Pt. alecto^ length (longitudinal axis of 

 crown) of p* 4-9-5-7, against 4-2-4-8, of m' 5-7-6'7, against 4-8- 

 0-7, of p^ 5-5-S, against 4-5-5, of m^ 5-5-8, against 4-6-5-2, of m^ 

 •3-&-4'8, against 3-2-3-8; width of cheek-teeth very nearly as in 

 J't. alecio. Structure of premolars, above and below, as in alecto; 

 posterior ledge extremely email or undeveloped in p' and p^, absent 

 in p*, m', p^, m.j, and m,. 



Palnte-rvlges. — 5 + 5f3; arrangement as in Pt. hi/poMelnnua 

 (p. J 01) and Pt. alecto. Occasionall)' a trace of an additional ridge 

 between the noruial 9th and 10th ridges. 



Ears.- — Itelatively slightly longer than in Pt. alecto. nearly 

 reaching back of eye. Outer margin flatly concave' above, tip of 

 ear narro-wly rounded off. 



