1394.) The Action of Leucocytes Toward Foreign Substances. 323 
b. Shows three nuclei, two in amoeboid movement and 
one resting. 
d. e. Leucocytes of Cryptobranchus. 
n. Nucleus. 
p. Cell-body. 
e. Has three nuclei, two amoeboid and one resting. 
Drawn from stained preparations. 
PLATE V. 
A. Surface section of liver of Cryptobranchus. 
p. Capillaries of blood-vessels. 
t. Liver-cells. 
b. Red corpuscles in the capillaries. 
d. Small intercellular capillaries of bileduct. 
e. Epithelium of the larger bile vessels. 
h. Hepatic cell-body. 
n. Nucleus of hepatic cells with nucleoli. 
Note the absence of extravascular ingested leucocytes. 
B. Vertical section of the spleen of Cryptobranchus. 
I. Part of the section near the surface. 
. Peritoneum. 
Layer of fibrous tissue forming the capsule. 
. Trabeculæ passing from capsule among splenic cells. 
Carbon-laden leucocytes. 
. Red corpuscles. 
Leucocytes, non-ingested. 
Splenic pulp-cells. 
II. Ental part of the section. 
Lettering as above. 
Note the ingested spleen pulp cells and the different distribu- 
tion of the carbon particles in them from that found in the 
leucocytes; also the absence of ingested splenic cells in the 
Superficial part of the spleen. 
eS oO WN Re 
p 
PLATE VI. 
A. Vertical section of lung of Cryptobranchus. 
E. Ectal surface. 
R. Ental or respiratory surface. 
