LYMPHATIC GLAXDS. 



clxxxix 



adventitious coat round their small branches, and even on some of the 

 capillaries (page clxxix). 



Fig. CV. 

 Fig. CIV. 



Fig. CIV. SECTION OF MEDULLARY SUDSTANCE OP AN INGUINAL GLAND OP THE Ox 

 (magnified 90 diameters). 



a, a, glandular substance or pulp forming rounded cords joining in a continuous net 

 (dark in the figure) ; c, c, trabeculae ; the space, b, b, between these and the glandular 

 substance is the lymph-sinus, washed clear of corpuscles and traversed by filaments of 

 retiform connective tissue (after Kb'lliker). 



Fig. CV. A VERT SMALL PORTION OP THE MEDULLARY SUBSTANCE FROM A MESENTERIO 



GLAND OF THE Ox (magnified 300 diameters). 



d, d, trabeculse ; a, part of a cord of glandular substance from which all but a few of 

 the lymph-corpuscles have been washed out to show its supporting meshwork of retiform 

 tissue and its capillary blood-vessels (which have been injected, and are dark in the 

 figure) ; >, 6, lymph-sinus, of which the retiform tissue is represented only at c, c (after 

 Kolliker). 



As to the lymphatics of the gland, it seems now to be tolerably well 

 made out, that the afferent vessels, after branching out upon and in the 

 tissue of the capsule, send their finer branches through it to open into the 

 lymph-sinuses of the cortical alveoli, and that the efferent lymphatics begin 

 by fine branches leading from the lymph-sinuses of the medullary part, and 

 forming at the hilus a dense plexus of tortuous and varicose-looking vessels, 

 from which branches proceed to join the larger efferent trunks. The lymph- 

 sinus, therefore, forms a channel for the passage of the lymph, interposed 

 between the afferent and efferent lymphatics, communicating with both, 

 and maintaining the continuity of the lymph-stream. The afferent and 

 efferent vessels, where they open into the lymph-sinus, lay aside all their 

 coats, except the epithelium, and the sinus is lined throughout its whole 

 extent with a similar epithelium, consisting, as in the commencing lymph- 

 lacuna, of a single layer of flattened cells. 



