56 Th. Lewis, The Structure and Functions of the hsemolymph Glands etc. 



Fig. 13. Section of gland of rat. Veins injected (as seen under a magnification 

 of 105 diameters). Lymphoid tissue dotted vlue, sinuses white, a certain 

 amount of injection has passed into the sinus in three places. (Reduced 



to V2-) 



Fig. 14. Silver nitrate preparation of inner wall of capsule (as seen under a 

 magnification of 600 diameters). Showing strands of white fibrous tis- 

 sue and endothelium, near the hilum of the gland. (Reduced to '/2.) 



Fig. 15. Sketch of trabecula from a hœmal gland of the ox (as seen under a 

 magnification of 600 diameters). Showing endothelium cells e^, and re- 

 ticulum cells }\c containing pigment; e^ is a cell containing an ery- 

 throcyte. 



Fig. 16. Section of spleen (as seen under a magnification of 600 diameters) to 

 show arrangement of reticulum and endothelium in the neighbourhood 

 of a Malpighian body, seen on the right half of the figure. leu. m leuco- 

 cyte in Malpighian body; /eu. s leucocyte in sinus. 



Fig. 17. Diagram of a lymphatic gland to show arrangement of adenoid tissue 

 and sinuses, the latter filled with leucocytes, coloured blue, quite dia- 

 gramatically : running towards the gland are diagramatic vessels. AL Af- 

 ferent lymphatic; E.L Efferent lymphatic; A.ß Afferent blood vessel; 

 E. B Efferent blood vessel. There is a large lymph supply, but the blood 

 supply is small. 



Fig. 18. Diagram of a hœmal lymphatic gland, the lettering is the same as in 17, 

 showing general arrangement of tissues and the breaking up of the 

 lymphoid tissue, also the large blood and lymph supply: the red dotting 

 represents blood. 



Fig. 19. Diagram of a haemal gland, showing preponderance of sinus; the lymphoid 

 tissue diminished and broken up. The sinus is filled with blood, only 

 one or two leucocytes are represented: the lymph supply as indicated 

 by the diagramatic vessels is very small, while the blood supply is large: 

 the reticulum is denser than in 18. Lettering as before. 



Fig. 20. Diagram of spleen, showing remains of lymphoid tissue in form of 

 Malpighian corpuscles; the sinus, or "spleen pulp" is full of blood; the 

 lymphatic vessels entering the gland are small, the bloodvessels large: 

 the reticulum and trabeculae are very strong: lettering as before. 



