326 Journal of Comparative Neurology. 



* Following the letter designating sex indicates that the 

 record has been used in a subsidiary table in the text. 

 Body-tveight. 



The total weight of the body as taken immediately after 

 death, was corrected, if necessary, first by subtracting the 

 weight of the stomach contents, when this was appreciable, and 

 second, in females, by subtracting the weight of the ovaries, 

 when these were mature enough to show black pigment. 

 Length. {Lgth.) 



The frog was placed belly downward on the millimeter 

 ruler and the legs given their greatest passive extension. The 

 length was then taken in millimeters from a vertical touching 

 the tip of the upper jaw to the end of the fourth toe of the 

 longer leg. The two legs of the same frog often differ slightly 

 in length. 

 Weight of the nmscles. 



Thigh — shank — foot. The leg was separated from the 

 trunk by cutting first along the faint line which marks off the 

 skin of the thigh from that of the trunk. The proximal at- 

 tachments of all the thigh muscles were then cut with a scis- 

 sors and the femur disarticulated at the hip-joint. 



Similarly, a separation was made at the knee-joint and at 

 the ankle. 



Each segment thus consisted of the bone or bones belong- 

 ing to it, surrounded by the muscles and associated tissues, and 

 covered by the skin. 



The weight of the tissues surrounding the bones and cov- 

 ered by the skin — that is, the muscles, tendons, nerves and 

 vessels — is that recorded as the weight of the muscles. The 

 records for the left leg always stand first in the table. 

 Length of leg- bo ties. 



The bones were applied to a small metallic scale and the 

 length read directly. In the case of the foot, the length was 

 taken from the proximal end of the apophysis of the calcaneum 

 to the tip of the fourth toe. 



