I)YAC0PTERU3 



651 



m. DYACOPTERUS *, geu. n. 



Tj'pe : D. spachceus. 



(Jynopterus (pt., 7iec F. Cue.), Thomas, An)i. ^- Magi. N. H. (6) 



"v. p. 2i3o (1890). 

 Balionj'cteris (pt.), Matschie, Megachiv. p. 80 (1899). 

 Tlioopterus (pt., nee Matsv/iie), Miller, Fum. Si- Gen. Bats, p. oO 

 (1907). 



Differential charucfers. — Similar to C'i/noj)teri(s, but premaxillaB 

 broadly and solidly united anteriorly, postdeiitti.1 palate much 

 shortened, postorbital foramina very small, upper canines deeply 

 grooved and without secondary cusp, p' absent (or deciduous), 

 cheek-teeth subquadrate in outline, membranes from second toe. 

 Forearm about 77 mm. [One species. Hab. Borneo.] 



Skull (fig. 53). — Short and broad, with deeper rostrum, and the 



Fig. o'.i. — D-yacoptcrus spadiceus, 5, type of species. J. 



zygomata standing much more widely out than in (Jijnopterus. 

 PremaxiUae unusually broad, solidly united in front, without trace 

 of suture, and produced forward considerably in front of canines 

 (row of upper incisors wholly in front of a line between fronts of 

 crowns of canines) ; nasals considerably broader anteriorly than 

 usual ; profile of lateral margins of nares, from tip of nasal to 

 front of premaxillie, therefore a deeply concave line. Postdental 

 palate only about one-fourth (in Ci/nojUeriis equal to, or more than, 

 one-third) of median palatal length (palation to incisive foramina). 

 Front of orbit above front of p\ Postorbital foramina present, 

 but much smaller tlian in Cijnopterns. Foramen rotundum and 

 ovale fused (in single specimen known). Sagittal crest Mell 

 developed. (Parietal and occipital regions of skull unknown.) 



* Di/ncopieri's, a winged Dyak. 



