48 
OX OUT-LYIXG NERVE-CELLS IN THE MAMMALIAN SPINAL-CORD. 
Figures 7 and 8, Plate 4. Out-lying cells in the posterior column, showing their 
relation to strands of connective tissue in which are medullated nerve-fibres. 
These cells are those the position of which is shown by two crosses in the pos¬ 
terior column of figure 9. Camera lucida and Zeiss apochromatic immersion, 
with ocular 4. 
Figure 9, Plate 3. Transverse section of human cord at level of 2nd lumbar nerve- 
root, showing the posterior horn and Clarke’s column. The number and 
position of the cells of Clarke’s column are shown by crosses, also the two 
out-lying cells of the posterior column drawn in figures 7 and 8. Camera lucida 
and Zeiss objective a, ocular 2. 
Figure 10, Plate 3. Transverse section of human cord at level of 8th thoracic nerve- 
root, showing posterior horn and Clarke’s column. The number and position 
of the cells of Clarke’s column are shown hy crosses. The position of an out¬ 
lying cell is indicated by the cross in the posterior column. Camera lucida and 
Zeiss objective a, with ocular 4. 
Figures 11, 12, and 13, Plate 3. Outlines, taken with the camera from preparations 
from the human cord at the level of the 3rd lumbar, 11th thoracic, and 9th 
thoracic nerve-roots respectively, to show the position of out-lying cells rela¬ 
tively to the cells of Clarke’s column and to bundles of medullated fibres 
passing through the radicular zone towards Clarke’s column. From Weigert 
hgematoxylin specimens. Zeiss A, ocular 4. 
Figui’e 14, Plate 4. The mesial limb of the substantia gelatinosa, showing bundles of 
root-fibres passing through it, and close to one of the bundles a solitary 
bi-polar nerve-cell. Human cord, at level of 4th lumbar nerve-root. Weigert 
hmmatoxylin. Zeiss objective A, ocular 2. 
Figure 15, Plate 4. The mesial limb of the substantia gelatinosa, with bundles of 
root-fibres passing through it; two large bi-polar nerve-cells in close relation 
to the bundles. Cord of Puppy. Weigert haematoxylin. Zeiss objective A, 
ocular 2. 
Figure 16, Plate 4. Posterior horn, with medullated root-fibres sweeping through 
the mesial limh of the substantia gelatinosa. In close relation to a bundle of 
fibres is a large nerve-cell. At level of 6th thoracic nerve-root. Lion cub. 
Weigert hasmatoxylin. Zeiss a, ocular 4. 
