LÖNNBERG, ON SOME MAMMALS FROM THE ARGENTINE CHACO. 15 



is smoke grey basally, and a påle shade of snuff brown 

 distally. 



Ear (moistened) 67 mm. 



Hind foot (dry) 145 » 



Tail (dry skin) about 300 » 



The skull indicates a large and strong animal. Unfor- 

 tunately the occipital region is broken away so t ha t the 

 total length and the condylobasal length cannot be exactly 

 recorded, but the following measurements prove the size of 

 the animal: 



Distance between tip of premaxillaries and lower lateral corner^ 



of occipital crest 140,5 mm. 



Zygomatic breadth 87,5 » 



Distance from frontoparietal suture (mesially) to tip of premaxil- 

 laries 122,5 » 



Length of nasals mesially 55 » 



Combined breadth of nasals anteriorlj' 14 » 



Least interorbital width 34,4 » 



Tip to tip of postorbital processes 50 » 



Intertemporal constrietion 33,4 » 



Distance from brim of orbit to tip of premaxillaries C8 » 



Breadth of braincase 48,5 » 



> across outsides of m^ 49 ^ 



Length of palate (not counting mesial spine) 76,5 » 



Front of canine to back of m" 70,5 » 



Length of p' along outer side ' 15 >> 



Greatest diameter oi p* 16,4 » 



Combined length of m^ and m- 20 > 



Transverse diameter of m* ' 13,3 » 



m 



an 



10,2 » 



Horizontal length of p' 8,8 > 



» p- 8,2 » 



Diameter of canine at cingulum 6,9 » 



Length of lower carnassial 16,2 » 



> » mandible from proc. articularis 122 » 



Height of ramua horizontalis below posterior half of W2 .... 20 



^ Where it meets the ridge from the zygomatic process of squamosum. 

 ■ Greatest breadth 14,7 mm. 

 ' Greatest breadth 11,6 mm. 



