ANIMAL AND VEGETABLE 

 ANIMAL VEGETABLE 



121 



Fig. 40. 



Unipolar cell from spinal gan- 

 glion of rabbit. (After Schafer.) 



Jl 



Fig. 41. 



Usnea barbata. Transverse sec- 

 tion of a branch : r, epidermal 

 layer ; m, fundamental tissue ; x, 

 axial strand. (After Sachs.) 



Fig. 42. 



A. Spiral and reticular fibrils 

 in the sheath of a nerve-fibre. 



B. Reticular appearance in the 

 medullary sheath of a nerve-fibre. 

 (Schafer.) 



Fig. 43. 



A. Cells from a leaf of Hoya 

 Carnosa. 



A. External view of the side 

 where the annular striae cross. 



B. Portion of an annular vessel 

 from the fibro-vascular bundle of 

 Zea Mays. (After Sachs.) 



The main differences between the two sets of figures 

 appear to be due to the absence of blood-vessels in the 

 vegetable sections ; although there seems to be a pro- 

 vision for the circulation of sap in the latter. 



