144 The Lumbosacral-coccygeal Cord of the Macaque Monkey. 



II s. IV s. II c. 



Ill s. i c. 



C2. — Outline Drawings of the Cross-section of the 

 Nerve. Magnification, 10 



Distance in cm. 

 from uppermost 



section of 

 I lumbar region. 



I Lumbar (upper) 0'142 I 



II Lumbar (middle) 1-068 II 



III Lumbar (middle) 1-710 III 



IV Lumbar (lower) 2-338 IV 



V Lumbar (lower) 2 "998 I 



VI Lumbar (middle) 3-191 II 



VII Lumbar (upper) 3-518 III 



III C. 



Cord in the Region of each Spinal 

 diameters. 



Distance in cm. 

 from uppermost 



section of 

 I lumbar region. 



Sacral (upper) 3 - 792 



Sacral (middle) 4-293 



Sacral (middle) 4-768 



Sacra] (upper) 5'054 



Coccygeal (middle) ... 5 - 644 

 Coccygeal (middle) ... 5'976 

 Coccygeal (upper) 6193 



Footnote to p. 142. 



* The subject of cubic volume has not been entered into, but a passing reference is 

 made to the relatively small volume of grey substance in the sixth lumbar region of the 

 present monkey. In a region of such great physiological importance this is a matter of 

 surprise, and may be due to error ; but against this view is the fact that, on examining 

 the cord of another Macaque monkey, the volume of the grey substance in the fifth lumbar 

 was again found to be greater than that of the sixth or seventh, though the difference 

 between the fifth and sixth was not so marked as in the present instance. A further 

 examination of several Macaque cords would be necessary to determine this point. 



