510 CHARLES R. STOCKARD AND E. M. VICARI 



are separated by connective tissue, giving a loose rather 

 than the usual compact appearance. The richly abundant and 

 brightly staining acidophiles range in size from quite large 

 to rather small. The basophiles are relatively few in number, 

 there being only one to about fifty acidophiles. 



The longitudinal section of the pituitary from 1146 $ , a 

 brother of the animal discussed above, is shown in figure 3. 

 The shape and relative proportions of this gland differ from 

 both figures 1 and 4. The entire gland is flattened dorso- 

 ventrally, and forms a long ovoid instead of being short, 

 thick and rounded in shape as is the pituitary from 11455. 

 The nervosa is relatively small and the infundibular lumen 

 extends into its body. The pars intermedia deeply invades 

 the nervosa along its dorsal surface and evaginates into it 

 from the distal pole ; this can be seen in the photomicrograph. 

 The discoidal pars distalis again covers only the ventral half 

 of the nervosa. The cells of the distalis are arranged in rows 

 and cords and are separated by an excessive amount of con- 

 nective tissue, which completely alters the usually compact 

 appearance of this portion of the pituitary. The acidophiles 

 are predominant and brilliantly stained, though distinct cyto- 

 plasmic granules are difficult to distinguish. Basophiles are 

 very scarce, and the few present lie near the ventral surface 

 of the gland ; their cytoplasm is uniformly filled with medium 

 sized granules. Although this animal was over 2 years old, 

 acidophiles outnumber basophiles more than 100 to 1. 



It is of interest to compare the head and body form of 

 the dog from which this gland was taken with the physical 

 characters associated with the pituitary of 1145 $ , discussed 

 just prior to 1146 $ . No. 1146 $ had a head of mastiff rather 

 than bulldog type, as is shown from life in figure 4 and by 

 the carefully mounted specimen in figure 6 of plate 62. 

 Figure 7 in the same plate illustrates the skeleton of this 

 animal. The skull is clearly mastiff in type, with a slight 

 prognathism of the mandible and small depression at the 

 nasion, a far different pattern from the skull of 1145 $ with 



