462 



PHTLLOSTOMTD^. 



caneum and inferior surface of the tibia and ankle, as in the Moi-- 

 mopes. 



Dentition. Inc. j, c. j^, pm. ^, m. ?^. Second lower premolar 

 minute. 



This genus, represented as yet by a single species only, appears 

 to come most closely of all the genera of this subfamily to the 

 Lohostomince. It agrees with Mormops and Chilonycteris in the 

 peculiar attachment of the wing-membrane to the calcaneum, and in 

 the very deep outer margin of the ear-conch, and with the latter 

 genus, to a considerable extent, in the form of the skuU. The pro- 

 jections also from the front surface of the horizontal nose-leaf recall 

 the much smaller projections from the extremity of the muzzle in 

 Chilonycteris, with which genus the single species also agrees in the 

 concave frontal and arched nasal bones, and in the direction forwards 

 of the nasal opening in. the skull. 



1. LonchorMna aurita. 



LonchorMna aurita, Tomes, P. Z. S. 1863, p. 83, pi. xii. ; Peters, MB. 

 Akad. Perl. 1866, p. 673. 



Crown of the head slightly elevated above the face-line ; muzzle 

 cylindrical, obtuse in front : ears large and broad, longer than the 

 head ; inner margin of the ear-conch strongly convex, tip shortly 

 rounded off, slightly inclined outwards owing to a concavity imme- 

 diately beneath, below which the outer margin becomes convex, and, 

 maintaining its convexity downwards, terminates abruptly near the 

 angle of the mouth directly below the anterior angle of the eye : 

 tragus long, reaching its greatest width opposite the base of the inner 

 margin, above which it tapers to an acute tip slightly inclined out- 

 wards ; above the base of the outer margin, at the widest part of the 

 tragus, a square lobe is placed (Plate XXI Y. fig. 1) : nose-leaf 

 remarkably long, as long as the ear ; the posterior erect leaf in shape 

 like an isosceles triangle, with a very acute vertical angle, its poste- 

 rior siirface with a prominent central longitudinal ridge but slightly 

 marked in front ; at the base of the leaf on either side the valvular 

 nasal apertures are placed, and directly in front of each a thickened 

 acutely pointed process about one tenth bf an inch in length, between 

 which the horizontal nose-leaf develops a central thickened obtusely 

 pointed process, having a horizontal offset at either side, and con- 

 nected at its base posteriorly by a band with the base of the large 

 terminal leaf ; front margin of the nose-leaf distinct and free from 

 the muzzle, slightly notched in front ; lower lip with a smaU central 

 transverse naked space above, and a narrow groove beneath in front, 

 with a raised naked cushion on either side (Plate XXIV. fig. 1). 



Antebrachial membrane developed along the forearm, and enclos- 

 ing the metacarpal bone of the thumb, which exceeds the first phalanx 

 in length ; first phalanx of the middle finger slightly more than one 

 third the metacarpal bone ; wing-membrane sheathing the extremity 

 of the tibia, and arising from the proximal extremity of the eal- 



