﻿288 ^^6 Philippine Journal of Science i9i4 



Fig. 2 — Continued. 



d, degeneration of the parenchymatous cells; primary step in the 

 formation of the casts. 



3. Highly magnified microphotograph of a section of the kidney from a 



pig infested with kidney worms. 

 a, parenchymatous cells, containing minute spherical droplets of 



colloidlike material. 

 6, droplets of eoUoidlike material, bursting out of the cells and 



beginning to accumulate in the lumen of a tubule. 



c, cells, the cell bodies of which have undergone complete degener- 



ation and are filled with droplets of colloidlike materials. 



d, the nuclei of cells which have undergone degeneration and still 



retain their staining properties. 



e, the lumen of a tubule practically filled with droplets of colloid- 



like material which have not coalesced. 

 /, casts formed in the tubules from the droplets extruded by the 

 parenchymatous cells. It will be noted that the tubules in 

 which these casts are located are practically denuded of their 

 epithelium. 



4. Microphotograph of a section of a lymph gland, showing thrombus 



formation from a pig infested with kidney worms. 



a, lymphoid tissue. 



b, thickened wall of blood vessel. 



c, obturating thrombus in the artery. 



d, thickened trabeculae. 



Plate III 



Fig. 1. Microphotograph of a section of a lymph gland containing a worm 

 tract, from a pig infested with kidney worms. 



a, worm tract filled with fibrin, cell detritus, and leucocytes. 



b, newly formed fibrous connective tissue capsule around a worm 



tract. 



c, newly formed blood vessels in the fibrous connective tissue 



capsule. 



d, a worm tract of longer duration than that of (a), containing 



fibrin, cell detritus, and leucocytes. 



e, a homogeneous zone, suggesting calcification. 

 /, well-formed connective tissue capsule. 



g, an old worm-tract, containing a granular mass of material. 

 h, a calcified zone. 



i, a well-formed old connective tissue capsule. 

 2. An aneurysm of the anterior mesenteric artery. 



a, anterior end of the mesenteric artery in close proximity to the 



posterior aorta. 



b, distal end of mesenteric artery. 



c, a section in the wall of the aneurysm, showing its thickness, 



most of which is composed of a coagulated fibrinous mass. 



d, the area from which the haemorrhage took place. 



e, nodules on the surface of the aneurysm, containing either 



kidney worms or cell detritus. 

 /, a constriction which divides the lesion into a large anterior 

 and small posterior aneurysm. 



