156 



MR HAROLD AXEL HAIG ON THE 



The large anterior lobe appears to be made up of two distinct portions (histologically 

 distinct), viz. a front part composed of syncytial strands of cells, with well-defined nuclei 

 and a few intervening sinusoids, or rather capillaries, since the endothelial walls are 



c.6: 



71- L 



FIG. 8. Mesial section of the portion lettered x in fig. 7 (moderately magnified). 



n.i. Neck of infundibulum. 

 p.l. Posterior lobe of pituitary. 

 s<. Strands of epithelial cells. 

 c.t. Connective tissue. 



v. Large blood-vessels. 

 x l . Similar tissue to above seen in the 

 tissue above anterior lobe. 



present (Plate II. B). The hind part of the anterior lobe is made up of fairly 

 large clumps of cells, the cell-outlines being quite distinct and the majority of them 

 having deeply stained cytoplasm of a somewhat granular character ; the nuclei are 



SyrC 



con. 



FIG. 9. A small portion of fig. 8 more highly magnified. 



syn. Syncytial strand (st. of fig. 8). 

 con.t. Connective-tissue fibres and cells. 



n. Nuclei of fibroblasts (lamellar cells). 



large and distinct.* In this part many large sinusoids occur, filled with erythrocytes ; 

 a few of the above-mentioned deeply-staining cells occur in the front part of the anterior 

 lobe, but the majority in the front part are syncytial and the cytoplasm but lightly 



* In these clumps, some of the cells possess much clearer cytoplasm, which is not deeply stained with eosin ; 

 in this respect the anterior lobe resembles that of the human pituitary gland. 



(ROY. soc. EDIX. TKANS., VOL. XLVIII., 864.) 



