330 



THE DUCTLESS GLANDS 



[CH. XXIII. 



interstices of which the proper substance of the spleen (spleen-pulp) 

 is contained. 



At the hilus of the spleen, the blood-vessels, nerves, and lym- 

 phatics enter or leave, and the fibrous coat is prolonged into the 

 spleen substance in the form of investing sheaths for the arteries 

 and veins, which sheaths again are continuous with the trabeculee 

 before referred to. 



The spleen-pulp, which is of a dark red or reddish-brown colour, 



FIG. 309. Section of injected dog's spleen, c, capsule; tr, trabeculge; m, two Malpighian bodies with 



is composed chiefly of cells, imbedded in a network formed of fibres, 

 and the branchings of large nucleated cells. The network so formed 

 is thus very like a coarse kind of retiform tissue. The spaces of 

 this network are only partially occupied by cells and form a freely 

 communicating system. Of the cells some are granular corpuscles 

 resembling the lymph-corpuscles, both in general appearance and in 

 being able to perform amosboid movements; others are red blood- 

 corpuscles of normal appearance or variously changed ; while there 



