86 



ANATOMICAL NOTES ON MALAY APES. 



climbing power, while Papio has had both supra and infra- 

 spinatus enlarged equally, which is probably connected with 

 with their all-fours locomotion on the ground. 



The lateral extension of the sternum seems to have a simi- 

 lar meaning. Indeed from the epiphysis we can read the late 

 history of the animal. 



Many of the tendinous insertions of muscles in adult life get 

 assimilated with the periosteum of the underlying bones and 

 thus there appears a difference in the adult and fcetal inser- 

 tion of a muscle. (See diags. XLIII and XLIV). 



VII.— A few Physiological Considerations. 



These problems are of even more interest than those of 

 variation and development already given. But to under- 

 stand their real meaning one must break through the conven- 

 tional idea of human time. While the clock that marks the 

 progress of things human has moved a century, the pendulum 

 that registers the progress of the things of evolution has but 

 swung a second. The failure to grasp a wider than vulgar 

 view of time has kept many of the conservative naturalists 

 from appreciating the final problems of evolution. 



Hozv the Stomach, Brain and Muscles are correlated. 



The stomach of the three gibbons weighed, on an average, 

 903 grains, while on an average their contents (mostly green 

 acid figs) weighed 4,100 grains. Their proportion to the 

 weight of the body was respectively .0110 and .0462. Taking 

 half-a-dozen of the Semnopitheci, their stomachs weigh 3,216 

 grains (relative weight=.040o) and contents 25,000 grains 

 (.3200 of body weight). The table shows this more clearly. 



Hylobates lar, 3 



Specimens, ... 



Semno. albocine- 



reus, 6 Specimens, 



Body Stomach 1 Contents|^ e . lati j; e 

 Weight. Weight. ! Weight, ffi^ 



. I 



12.5 lbs. 1 903 grs. 4, 100 grs.; .0110 

 15.4 lbs. 3,216 grs. 1 25,000 g rs. .0400 



Relative 



Weight, 

 Contents 



.0462 

 .32OO 



