822 PROCEEDINGS OF THE NATIONAL MUSEUM. 



appearance of the rostrum. Anterior zygomatic root essentially as in 

 Mus norr('(j!ci(x. Nasals terminating- posteriorly about in line Avith 

 preniaxillaries. Audital bulhe and entire ventral aspect of skull 

 (broad rostrum excepted) as in 2fti8 norvegieu.s. 



The maxillary teeth ditfer from those of t\'pical IFus in the greater 

 development and more evident demarkation of the lateral series of 

 cusps, botli outer and inner. There are, however, no unusual elements 

 in the teeth. The mandibular teeth show no appreciable peculiarities. 



MeaxK re merits. — Total length, 485 mm. ; head and l)ody, 228; tail, 257; 

 hind foot, 46 (43); ear from meatus, 1!>; car from crown, 13; width of 

 ear, 14.4; skull, upper length, 44.0; condylobasal length, 44; basilar 

 hnigth, 38; palatilar length, 22.8; diastema, 13; length of nasals, 15.2; 

 greatest ])readth of nasals, «!; greatest breadth of rostrum, 8.4; least 

 deptliof rostrum, 1»; zygomatic breadth, 23.4; interorbital constriction, 

 7; breadth of l)rain case above roots of zygomata, 17.4; mastoid 

 breadth, 16.6; maxillary tooth row (alveoli), 8.6; mandible, 27; mandi- 

 bular tooth row (alveoli) 8. 



Speciinois eraiiilned. — One, the type. 



jRemarks. — For the sake of convenience, I have compared this 

 remarkabl}' distinct species with Mus n&rvegicus^ an animal with which 

 it probal)ly has no near relationship. The .strong development of the 

 lateral cusps of the maxillar}' teeth removes it from the typical group 

 of Mus^ ])ut in the present unsatisfactory' state of this genus I am not 

 able to decide as to the forms with which it should be placed. 



PTEROPUS ENGANUS, new species. 



1894. Pteropus JiypoinelannsTuo^iAs, Ann. Mn.s. Civ. di Stor. Nat. di Geneva, (2) 

 XIV, p. lOf), April 10, 1894. 



Type.— Adult male (skin and skull). No. 140966, U.S.N.M. Col- 

 lected on Pulo Dua, Engano, November 4, 11>()4, by Dr. W. L. Abbott. 

 Original number, 3774. 



Characters. — Similar to Pteropus lepidiis Miller, but smaller, and 

 with 1 ack darker than th(^ mantle. Larger than Pteropus hypqmelaniis 

 Temminck. 



Color. — Type: Back a rather dark hair-brown, darkest and clearest 

 anteriorl}'^, though everywhere somewhat lightened by a sprinkling of 

 silvery hairs, and along edges of membranes a little sutiused with 

 ochraceous-])uft'. Mantle pale tawny-ochraceous, darkening on sides 

 of neck through hazel to chestnut, this in turn blackening on under- 

 side of neck. Behind this bhickish area the underparts are nuich like 

 })ack, except that the brown is darker, the silvery hairs are absent, and 

 the lighter sutlusion is more nearly hazel. Head a grizzled drabby 

 gra}' , many of the hairs with noticeable silvery reflections in certain 

 lights. 



