29S MEMOIES OF THE QUEENSLAND MUSEUM. 



MACROPUS WELSBYI new species. 



The Red Stradbroke Wallaby. 



Size medium : gejierr-l form robust ; not slender. Colour remarkably 

 uniform, agreeing best with the ''orange- rufous " of Ridgeway's nomenclature 

 (Plate IV. Xo. 13) ; this colour extends on the top and sides of the head to 

 the region of the orbits, also on the sides and limbs, but is listiacily lighter 

 on the ventral surfaces and base of tail (tail incomplete), and merges into 

 brown on the forepaws. Fur fine and silky in texture ; hairs on back fully 

 35 m.m. long, but with no outstanding longer hairs with special colour zones. 

 The bases of the hrirs are buff-coloured throughout. Top of muzzle grizzled. 

 AVith the exception of a darker arei below the eye, which merges towards the 

 nasals into the grizzled appearance of the muzzle, there are no face- markings, 

 and there is no indication of a white whisker sti^ipe. 



Rhinarium large and naked, the wide superior border of granulate'! area 

 being almost straight, and in this respect corresponding closely with that of 

 valahatus. Ears oval, thick and muscular, 80 m.m. in length ; thickly clothed 

 externally with the uniform orange-rufous hairs ; almost naked iiiteriorly except 

 for strong lateral tufts and a few scattered hairs. 



Skull. — The type sknll is from a specimen which is not fully mature. 

 The third premolar and also m.p.* (using Thomas's notation from the British 

 Museum Catalogue) a-e still in place. The labial portion of p."* has been exposed 

 from the alveolus, and it is evident that this tooth is of the massive valabatvs 

 type, with prominent vertical ridges, the length being 9 mm. The fourth true 

 molar is only just beginning to emerge. 



Facial axis short, 208. Premaxillse short and upright, with the sutures 

 only slightly oblique. Nasals parallel in region of premaxillse, then gradually 

 increasing in breadth to the fronto- maxillary suture ; slightly emarginated in 

 the sagittal line at the union with the frontals. No distinct postorbital 

 processes, and no marked constriction, but supraorbital ridges prominent. 

 Frontal region very .-^lightly concave. Infraorbital foramina opening 9 mm. 

 from orbit. Palatal openings oval, 11 mm. in length. 



Front incisors placed vertically as in ualabatus ; 1.^ with the posterior 

 segment slightly shorter than that anterior to the notch ; p.^ oval, 7 mm. long. 

 Measurements, basal length 110 ; greatest breadth 64 ; nasals : length 45, 

 greatest breadth .15-5, central breadth 10 ; intertemporal breadth 18-5 ; palate 

 length 70, breadth outside m.^ (perm, teeth) 34, inside m^, 20 ; palatal foramina 

 6-5 ; diastema to p.m.* 18 ; bar.i-cranial axis 3''» ; basifacial axis 75 ; facial 

 axis 208 ; Teeth, length of third incisor 7-5, length of p.* (measured in alveolus) 

 9 ; length of m.^ — m.^ (permanent molars) 22. 



