9 6 



THE PHYSIOLOGY OF REPRODUCTION 



is said by Heape (but not by van Herwerden) to be the case in the 

 monkey. 



During the earlier stages of recuperation a variable, and often a 

 large, number of red blood corpuscles remain scattered in the stroma, 

 chiefly in the part nearest the surface. At a later stage extravasated 

 corpuscles are no longer seen in any quantity, while numerous new 

 vessels appear to have been formed, presumably from pre-existing 

 vessels. 



Polymorphs are no longer common in the bitch's mucosa tissue, 



polym. 



polym. 



*>&*&a*8& 



l!r 1%1? f ^ 



U. v. 



pig. 



FIG. 15. Section through edge of mucosa of dog during an early stage of 

 recuperation. (From Marshall and Jolly.) 



bl. v., Blood-vessel ; ep. , epithelium in process of renewal ; pig., pigment ; 

 polym., polymorph. 



but leucocytes of other varieties are a characteristic feature. The 

 following kinds have been observed: (1) Coarsely granular eosinophil 

 cells, with lobed nuclei. These occur in the blood in cases of 

 trichinosis, bronchial asthma, sarcoma, osteomalacia, skin diseases, 

 and other affections, but are rare under ordinary conditions. (2) 

 Basophil cells, with simple nuclei and containing coarse granules, 

 but never any pigment. The number of granules varies, and in some 

 of the cells is very small. These basophil ceils are evidently similar 

 to the mast cells of Ehrlich and the plasma cells of Unua. Mast 

 cells are said to be often found in inflammatory areas, and are 

 described as occurring in the stroma tissue of tumours in association 

 with plasma cells, and also in tjhe peripheral circulation in cases of 



