74 
HEMOLYMPH NODES OF THE SHEEP 
Fig. 15. — A node in which the hemal area is large and continuous, and in which 
the remaining lymphatic tissue is found chiefly at the periphery. 
Fig. 16. — A portion of an almost empty node in which all the venous radicles 
or lacunae are found surrounded by lymphatic tissue. A few of these communicate 
directly with the large hemal area, which contains little blood and many fragments 
of erythrocytes. This node is subdivided more or less completely by thick con- 
nective tissue septa. 
Fig. 17. — Camera lucida drawing of a node containing but little lymphatic tissue, 
at the periphery of which a large, almost continuous lacuna is seen. 
Fig. 18. — A section of an almost depleted node, showing the characteristic dis- 
tribution of the lymphatic tissue with the contained venous lacunae. 
Fig. 19. — A section of a similar node. The entire absence of follicles and the 
profoundly modified architecture suggest that such nodes are disappearing. 
Fig. 20. — A small portion of a hemal node, showing a venous lacuna opening 
directly into the parenchyma at the left, where the degenerating erythrocytes and a 
large phagocyte lie. x 410. 
Fig. 21. — A large venous lacuna containing granular detritus and surrounded 
by hemal areas composed almost wholly of excellently preserved erythrocytes, 
which are everywhere separated from it by definite walls and a narrow border of 
lymphatic tissue, x 920. 
Fig. 22. — A partially collapsed venous lacuna, showing a definite endothelial 
wall on one side and a barrier of lymphatic tissue on the other, separating it from 
the surrounding hemal areas, x 920. 
Fig. 23. — A rare section showing the communication of a capillary with a venous 
lacuna, x 750. 
Fig. 24. — A section through a process of lymphatic tissue containing a large 
hemal area, which projects into a large venous lacuna or sinus. There is no direct 
communication between the latter and the hemal area anywhere, x 630. 
Fig. 25. — A portion of a large hemal area containing abundant and coarse retic- 
ulum. In many places the reticulum fibers have no doubt been forced together, 
x 630. 
Fig. 26. — A portion of a node showing the accumulation of eosinophiles around 
the artery. Several degenerating giant cells are also seen, x 1340. p. 61. 
August 25, 1913. 
