130 PROCKK DINGS OK TMK ANATOMICAL AND ANTI[ROI'OLOGICAL 



was narrower and thinner than normal. Nothing unusual was noticed 

 in regard to the lumbar vertebra;. There were extra lobes in the 

 lungs. 



(Signature of observer) ALEX. H. SKINNKK. 



THE MYOLOGY OF TROGLODYTES NIGER. 

 By J. C. G. LEDINGHAM, A.M., M.B., Ch.B., B.Sc. 



The chim})anzee, whose musculature forms the subject of this 

 short memoir, was very kindly given to me for dissection purposes by 

 Prof. li. W. Reid in the summer of 1899. A good deal of the 

 dissection was completed in the autumn of that year, but through 

 stress of other work it had to be discontinued till some months ago. 

 The animal has been divided mesially from occiput to coccyx, and the 

 dissection preserved in the accompanying trough is that of the com- 

 plete left side of the animal. The brain and the skin coverings of the 

 left hand and foot are also enclosed, and may be useful for purposes 

 of comparative morphology. The animal is a male with dentition 

 complete. Preparatory to dissection the hair covering of dark brown 

 colour was singed off, but the accompanying photographs kindly 

 taken in 1899 by Mr. Alexander Low, A.M., M.B., show very clearly 

 the general distribution of hair on the body of the animal. An 

 attempt was made to obtain finger and toe prints with only partial 

 success owing to the crinkled condition of the palmar and plantar 

 skin. It was perfectly plain, however, that simple loop forms con- 

 stituted the prevailing patterns. In the following description of the 

 musculature it is not intended to give a detailed account of the origin 

 and insertion of all the muscles, as these, in the great majority of 

 cases, present no essential points of difference from the condition 

 found in man. My object is rather to note the most striking 

 peculiarities in chimpanzee myology as compared with human, and 

 their importance in comparative morphology. In compiling this 

 memoir I have consulted the following works, and compared my 

 results with those therein detailed : 



