PLATE 3 



EXPLANATION OF FIGURES 



The reduced magnification of the figures of this plate is now 630 diameters. 



14 An osteoclast with irregular processes, some of which are continuous with 

 the marrow connective tissue. 



15 An oxyphilic syncytium in the marrow, apart from the bone. Continuity 

 with the connective tissue suggests a possible origin from the latter. 



16 An early stage in the degeneration of osteoclasts. Nuclei are pyknotic; 

 cytoplasm slightly vacuolated. 



17 The isolated (?) spicule of bone is surrounded by a degenerating osteo- 

 clast which shows extreme vacuolization and cytoplasmic disintegration. 



18 Vacuoles have nearly cut off that portion of the osteoclast indicated by a 

 cross. Such an appearance has been interpreted by some as indicative of a reso- 

 lution into reticulum cells. 



19 A highly degenerated osteoclast apparently left behind after resorption 

 was locally completed. 



341 



