AND PERSONALITY 



weighed 1,683 pounds. Raising a tarpaulin over him and 

 suspending our 6oo-pound scales on a limb, we made our 

 dissection where he fell. 



Dissection showed that the distribution of the muscles of 

 the rhinoceros differs greatly from that found in antelopes 

 or in the lion. There were five principal masses of muscles: 

 one for the powerful head and one for each of the four 

 stocky legs. The muscles of the back were not comparable 

 to those of the antelope or of the horse family. The rest 

 of the body exhibited but relatively little muscle, which 

 suggested a mechanism adapted to straightforward progres- 

 sion with powerful action of the head and little or no power 

 of jumping. 



The bones of the vertebral column were soft and con- 

 tained much blood and cancellous tissue, the skull and the 

 ribs were exceedingly hard, and the muscles of the neck, 

 which operated the great horn, were more massive than 

 those which operated the legs. 



The dimensions of the heart were 12 inches from base to 

 apex and 8 inches transversely. The heart weighed 4,800 

 grams. The wall of the left ventricle was 2 inches thick. 

 The aorta measured 2 inches in diameter, and its wall was 

 % 6 inch thick. The coronary artery was so large that it 

 admitted the forefinger. 



The brain weighed 655 grams or a little less than one- 

 seventh of the weight of the heart. The convolutions of the 

 brain were small as compared with those of the brain of an 

 antelope. The olfactory lobes were especially prominent, 

 being projected forward in bony cavities leading toward 

 the snout, somewhat as in the case of the alligator and 

 crocodile. The pituitary gland was relatively large. 



The eyes of the rhino weighed 22.56 grams; the eyes of a 

 55-pound Thomson's gazelle weighed 26.9 grams. 



The major, minor, and lesser splanchnic nerves (sym- 

 pathetic system), contrasted with those of man, were 

 heavy, and the sympathetic complexes and celiac ganglia 



49 



