RIGGS: HOPLOPHONEUS OCCIDENJALIS. 5I 



Smaller. Larger, 

 mm. mm. 



Tibia, length 234 



" transverse diameter of proximal end 60 62 



' ' transverse diameter of distal end 37 40 



Fibula, approximate length 210 



" width of proximal end 28 



" width of distal end 27 



' ' thickness of distal end 16 



Calcaneum, length 68 



' ' width across processes 38 



Astragalus, length 46 48 



" greatest width. 33 37 



Second metatarsal, length 60* 



" " width proximal end 10 



" " vertical diameter proximal end. ... ig 



" " width of distal end 16 



Fourth metatarsal, length 61 



" " width of proximal end 17 



" " width of distal end 17 



Fifth metatarsal, length 55 



" " width of proximal end 18 



" " width of distal end 14 



SUMMARY. 



In short, the characters of Hoplophoneus occidcntalis, as shown 

 from these specimens, are: Size similar to that of the Felis onca 

 but stouter bodied and limbs shorter in proportion; skull large in 

 proportion to body, deep but narrow, brain case small, sagittal 

 crest concave, occiput strong and overhanging, zygomatic processes 

 drooping, superior canine trenchant only at point, and inferior 

 sectorial with a rudimentary heel; atlas with an atlantar foramen; 

 zygopophysis firmly interlocked and but little diverging from the me- 

 dian line; sacrum long but narrow at the anterior end; caudal vertebrae 

 stronger with processes better developed and neural canal extend- 

 ing to the eleventh; scapula with neck little constricted, glenoid 

 cavity deep and rounder than in recent cats, the posterior border 

 at the origin of the teres minor thickened and massive; humerus 

 with deltoid and supinator ridges unusually developed, lesser 

 tuberosity separated from the head by deep groove, the internal 

 epicondyle unusually prominent and separated from the trochlea 

 by a broad notch; ulna with the oberanon two-ninths the length of 



^Estimated. 



