92 



PEARL BRIGGS BULLARD 



cords in the series have average dorsal funiculi smaller in pro- 

 portion to the ventro-lateral funiculi than does the human spi- 

 nal cord. The dorsal funiculus in man is made up, in large part, 

 of ascending axones of spinal ganglion neurones, a large propor- 

 tion of which connect the cord with the encephalon. The latter 

 reaches its highest development in man and the dorsal funiculus 

 is correspondingly increased in size. We might expect the cer- 

 vical region in man especially to show a larger ratio for the 

 dorsal funiculus than does the thoracic or lumbar region since 



TABLE 8 6 



Ratios dorsal funicuhis to ventro-lateral funiculus. Table 8b records the same data 

 as table 8a but with the animals arranged according to the relative size of the dorsal 

 funiculus in each region of the cord instead of according to body weight. ■ 



CERVICAL 

 1 



THORACIC 

 2 



Raccoon 2.13 



Rhesus monkey. .2.18 



Man 2.19 



Spider monkey. . .2.32 



Mouse 2.34 



Bat ..2.43 



Opossum. . 2.52 



Elephant 2.55 



Ape 2.56 



Java monkey 2.88 



Agouti 2.99 



Rat 3.05 



Lynx 3.15 



Dog 3.24 



Cat 3.34 



Bear 3.35 



Ox.. 3.50 



Guinea-pig 3.59 



Horse 3.61 



Kangaroo 3.71 



Sheep 4.27 



Rabbit 4.30 



Fox 4.33 



Hog 4.72 



Man 2.26 



Bat 2.27 



Spider mon- 

 key 2.75 



Mouse 3.03 



Raccoon. . . .3.17 



Rat 3,17 



Cat 3.45 



Guinea-pig . 3 58 



Ape 3.70 



Elephant. . .4.07 



Bear 4.16 



Agouti 4.35 



Opossum . . .4.91 



Hog 5.55 



Rabbit 6.10 



Dog 6.41 



Lynx 6.71 



Horse 6.73 



Java mon- 

 key 6.75 



0\ 6.90 



Rhesus mon- 

 key 7.03 



Kangaroo . . 7 . 72 



Fox 8.42 



Sheep 9.04 



LUMBAR 

 3 



Mouse 1 . 67 



Rhesus mon- 

 key 1.76 



Man 1.86 



Bat 1.91 



Spider mon- 

 key 2.12 



Bear 2.18 



Horse 2.31 



Ape 2.38 



Lynx 2.51 



Cat 2.60 



Hog 2.62 



Agouti 2.84 



Rat 2.90 



Raccoon.... 2. 92 

 Kangaroo . .3.04 



Ox 3.22 



Dog 3.24 



Sheep 3.51 



Guinea-pig. 3. 58 

 Java mon- 

 key 3.94 



Rabbit 3.98 



Opossum . . .4.12 

 Fox 4.44 



AVERAGE 

 4 



Man 2.10 



Bat 2.20 



Mouse 2.34 



Spider mon- 

 key 2.39 



Raccoon 2.75 



Ape 2.88 



Horse 2.95 



Rat 3.04 



Cat 3.13 



Bear 3.23 



Agouti 3.39 



Guinea-pig. .3.58 

 Rhesus mon- 

 key 3.65 



Opossum . . . . 3 . 85 



Lynx 4.12 



Dog .4.29 



Hog 4.29 



Java mon- 

 key ..4.52 



Ox 4.54 



Rabbit 4.79 



Kangaroo. . . .4.82 



Shecj) 5.60 



Fox 5.73 



