1905.] 



Cord of the Macaque Monkey. 



103 



A2. The Percentage of the Grey and of the White Substance in the Cross- 

 section of the Cord. 



Table VI. — Percentage of the Grey and of the White Substances and of 

 the Central Canal in the Cross-sections of the Cord. The total area 

 of each cross-section of the cord = 100 (Charts III, IV, V, and VI). 



Kegion of cord. 



Dorsal (thoracic)- 



VI 



XII 



Lumbar — 



(" Upper 

 1^ Middle 

 |_ Lower , 

 f Upper 

 II < Middle . 

 L Lower , 



{Upper 

 Middle . 

 Lower . 

 f Upper . 

 IV -i Middle . 

 L Lower , 

 I Upper , 

 Y-l Middle 

 L Lower . 

 f Upper . 



VI I Middle . 

 L Lower 



{Upper 

 Middle , 

 Lower . 



Sacral — 



f Upper . 

 li Middle . 

 L Lower 



{Upper , 

 Middle . 

 Lower . 

 f Upper , 

 III I Middle . 

 L Lower 



{Upper . 

 Middle . 

 Lower . 

 Coccygeal — ■ 



C Upper , 

 I ^ Middle . 

 |_ Lower . 

 f Upper . 

 II -I Middle . 

 |_ Lower . 

 f Upper . 

 IEN Middle . 

 L Lower . 



Distance in 

 cm. from 



uppermost 

 section of 



I Lumbar 

 region. 



142 



268 

 608 

 846 

 058 

 302 

 558 

 681 

 918 

 064 

 244 

 484 

 608 

 794 

 944 

 154 

 205 

 328 

 450 

 557 

 642 



782 

 906 

 057 

 197 

 316 

 509 

 623 

 723 

 858 

 974 

 138 

 312 



486 

 622 

 726 

 847 

 939 

 058 

 174 

 278 

 331 



Percentage 



of grey 

 substance. 



Mean 

 per- 

 centage. 



12 

 16 



20 

 19 

 21 



24 

 25 

 25 

 27 

 28 

 28 

 32 

 35 

 35 

 36 

 39 

 42 

 43 

 42 

 43 

 45 

 45 

 45 



45 

 46 

 46 

 46 

 46 

 47 

 46 

 47 

 48 

 49 

 49 

 49 



52 

 52 

 52 

 51 

 52 

 51 

 50 

 47 

 47 



76 

 50 



06 

 63 

 56 

 59 

 60 

 02 

 54 

 33 

 70 

 14 

 91 

 89 

 67 

 97 

 12 

 84 

 18 

 43 

 64 

 96 

 27 



61 



88 

 97 

 95 

 41 

 16 

 35 

 82 

 81 

 15 

 70 

 27 



60 

 93 

 58 

 25 

 07 

 29 

 90 

 58 

 37 



Percentage 

 of white 

 substance. 



20 -42 

 25 -07 

 28 -21 

 34 -65 

 39 -59 

 43 -25 



45 -62 



46 -49 



46 -84 



47 -66 

 49 -37 



52 -70 

 .51 -53 



48 -62 



83 



79 

 80 

 78 

 75 

 74 

 74 

 72 

 71 

 70 

 67 

 63 

 63 

 62 

 59 

 57 

 55 

 57 

 56 

 53 

 53 

 54 



54 

 52 

 52 

 52 

 53 

 52 

 53 

 52 

 50 

 50 

 49 

 50 



46 

 46 

 46 

 48 

 47 

 47 

 47 

 52 

 51 



78 

 46 



54 



25 



05 



23] 



25 y 



51 J 



191 



54 y 



98 J 

 66] 

 86 y 

 77 J 

 90] 

 57 I 

 71 i 

 97] 



4i y 



20 J 



59 L 

 31 J 



09 

 99 

 52 

 75"] 



24 y 



74 J 



33 



18 



80 



281 



85 1 



24 J 



651 

 86 y 

 71 J 



67 ] 

 70 [ 

 89 J 

 60] 

 03 y 



68 J 



Mean 

 per- 

 centage. 











■051 



. . 







•087 









•157 



79 -28 







•118 









•116 









•054 



74 -66 







•072 









•185 









•231 



71 -57 







•134 









■132 









•109 



65 -10 







•103 





o 



•201 









•179 



60 -06 







•241 









•247 









•188 



56 -53 







•199 









•283 









•175 



53 "93 







•212 









■311 









•238 



53 -20 



.0 



■127 









■146 









116 



52 -91 







■129 









•149 









■208 



52 -10 







•114 









■265 









•211 



50 -12 







•223 









•243 









•278 



46 -74 







■313 









•352 









•332 



48-09 







•360 









•586 









•898 



50 -44 







•676 









•956 



