220 



BULLETIN 57, UNITED STATES NATIONAL MUSEUM. 



Upper incisors simple, the four teeth lying almost in the same line, 

 the outer well developed, but considerably smaller than the inner and 

 separated from canine by a space about equal to the diameter of its 

 crown; lower incisors trifid, their crowns strongly imbricated and 

 increasing regularly in size from first to third, the series continuous 

 between canines, and strongly, almost angularly convex. Canines 

 well developed, simple. Cheek teeth strictly normal ; pm 2 minute, 

 crowded in inner angle between canine and large premolar, pm i with 

 very small inner anterior cusp ; m 1 and m 2 without hypocone, and 

 with metacone, especially in m 1 , unusually large, m 3 with rather 

 more than half the crown area of m 1 or m 2 , its mesostyle, metacone, 



and three commissures well de- 

 veloped; lower molars with the 

 cusps normal in size and posi- 

 tion. Skull (fig. 36) with rather 

 short, deep braincase and broad,- 

 low rostrum, the length of which 

 is about two- thirds that of brain- 

 case; a slightly angled ridge 

 along edge of anterior portion 

 of orbit; palate rising rather 

 noticeably in front, and floor of 

 braincase sloping upward poste- 

 riorly, so that the two surfaces 

 are set at a distinct angle with 

 each other ; audital bulla? small ; 

 basisphenoid pits shallow and 

 indistinct; palatal emargination 

 broad and shallow, much as in 

 Lasiimis; nares moderate, 

 slightly longer than broad. Ex- 

 ternally characterized by the 

 short, broad head ; low, rounded 

 ears with tragus much widened above (its width along upper border 

 nearly equal to length of anterior margin) and with antitragus con- 

 tinued forward to angle of mouth, where it terminates in a conspicu- 

 ous lobe ; swollen muzzle and chin, each of which is separated from 

 wide lip by deep narrow groove; and slight or no graduation of meta- 

 carpals (fifth never less than third by more than one-eighth or one- 

 tenth length of forearm). 



Specie's examined. — Ghalinolohus tuberculatus (Forster), G. signi- 

 fer Dobson, G. govldi (Gray), and G. nigrogriseus (Gould). 



Remarks.— In certain respects this genus and the next resemble 

 Lasiurus and Dasypterus, particularly in the form of the head and 

 ears and in the general structure of the skull. Externally the two 



Fig. 36.— Chalinolobus tuberculatus. .Adult 

 male. dunnedin, new zealand. no. 38031. 



X2f. 



