BY N. DE MIKLOUHO-MACLAY. 147 



very elongated and as in the skull of D. Brunii, the 2 marked 

 ridges of the parietalia, running from the orbital margin of the 

 frontal bone, join together in a median crest, which extends over 

 the interparietal bone towards the superior anterior margin of the 

 occipital bone. This median parieto-occipital crest is a point in 

 which the skull of D. Beccarii differs from the skulls of D. 

 luctuosa (^1) and D. Chalmersii. 



The apex of the angular process of the inferior margin of the 

 zygoma corresponds with the anterior cusps of the 3rd molar. 

 The nasal bones are in the middle, a little nai-rower than on both 

 ends, which character has also been noticed in D. Brunii. (2) 



The Palate presents 8 well marked transverse folds without 

 counting a few (6) smaller ones in the anterior corner of the 

 palate, between the canines and the incisors. About the disposition 

 of these folds I refer to tig. 2. 



One large posterior Palatine foramen with several very much 

 smaller behind on each side. 



The median upper Incisors of D. Beccarii, present the character 

 of the genus, being much larger than the latei-al ones, which 

 appears to be, in the specimen of the Macleay Museum, very much 

 worn down and does not show any indication of cusps on their 

 lower margin, as is the case in D. luctioosa and D. Chalmersii. 



About the size (length) of the canines our specimen cannot be 

 considered as a standard for the species (3). The distance from 

 the canine to the premolar (measured on the base of the x'espective 

 teeth) is 3^ times the distance between the canine and the 2nd 

 lateral incisor. 



The breadth of the upper Premolars, from before backwards, is 

 quite as great as of the two molars together with the anterior 



(1) A. H. Garrod : On the kangaroo called Hab)iatu7-us hictuosens, &c., 

 &c. Proceed. Zool. Soc, 1875. Plate VII. 



(2) Schleyel en Mi'dkr : Loc. cit., p. 137. 



(3) As already stated, the skulls cf the specimens of the two species of 

 Dorcojpm which description form the subject of this paper, had unfortunately 

 suffered a great deal, by the mode of preservation, so that the minor details 

 of the detitiou could therefore not be discerned, as for instance : I could not 

 decide, if tlie lower margin of the lateral incisors is cuspidated or not, could 

 not judge about the size and shape of the canines, etc., etc., in removing the 

 crust of magnesia the enamel has been also veiy likely partly removed. 



