48 



EXPLANATION OF PLATE X. 



Fig. 3. Yellow fibres from the outer surface of the ligamentum nucha of the giraffe, 

 showing transverse stria. 



Fig. 4. A portion of the same more highly magnified, showing the true shape of the 

 striae, and the fact of their not extending across the entire diameter of the 

 fibres. 



Fig. 5. Yellow fibres from the interior of the ligamentum nucha of the giraffe, show- 

 ing the absence of the striae. 



Fig. 6. A portion of the same more highly magnified, showing faint indications of 

 the central linear stripe. 



Fig. 7. Yellow fibres from the ligamentum nuchas of the sheep. 



Fig. 8. A portion of the same more highly magnified. 



