CO]S T XECTIVE TISSUES 45 



Mall * has recently attempted to show that reticular tissue should 

 be considered as that form of connective tissue which has been 

 least differentiated from the embryonic mesenchymal type. He 

 accordingly considers the cells of the reticulum as formed by the 



FIG. 48. EETIOULUM FROM THE MUCOSA OF THE FUNDUS REGION OF THE DOG'S STOMACH. 



The section was made parallel to the surface and the glandular tissue removed by 



shaking in water. Picro-carmin. x 125. (After Mall.) 



undifferentiated endbplasm, and the reticular fibres as representing 

 the specialized exoplasm of this most primitive type of connective 

 tissue. 



Lymphoid Tissue (adenoid tissue). Lymph oid tissue is a retic- 

 ular tissue the meshes of whose network are occupied by a closely 

 packed mass of small spheroidal cells, the lymphatic corpuscles. 

 These cells have a prominent ovoid nucleus which is richly sup- 

 plied with chromatin and is occasionally indented, constricted, or 



* Am. J. of Anat., 1902. 



