568 ON THE MINUTE ANATOMY OE THE THYEOID GLAND OE THE DOG. 
the lymphatics, together with the nuclei of their endothelial cells seen in 
profile (see above, page 562). 
Figs. 12 & 13 represent a further stage in the movement of the parenchymatous cells 
to that seen in figs. 8 and 9. 
Fig. 14. From a longitudinal section, showing three parenchymatous cells (b), apparently 
situate in a common cavity. The wall of a neighbouring vesicle has become 
flattened out, and the flattened epithelial cells have separated, placing the 
parenchymatous cells in free communication with the interior of the vesicle (a). 
Fig. 15. From a transverse section, showing parenchymatous cells ( b ) and also small 
vesicles (c). The latter with opaque uniform contents, as above described 
(p. 560) ; the former exhibiting a granular cell-substance and large oval-shaped 
nuclei. The cells separating them, possibly from being shrunk, present 
almost the appearance of a reticulum. 
