9 o 



BENSLEY. 



[VOL. II. 



Duct{ 



Neck 



ordinary cylindrical cells of the stomach at the point where 

 the first glands appear, and the oesophagus expands suddenly 

 into the stomach. The ciliated epithelium does not extend into 

 the stomach. 



The gastric zymogenic glands are of two kinds. The ante- 

 rior oxyntic glands occupy the proximal portion of the mucous 

 membrane and form a zone about 2 mm. in width around the 



oesophageal orifice of the stom- 

 ach. They are much shorter 

 than the other gastric glands 

 and, like the corresponding 

 glands in Triton, are more 

 highly branched, and contain 

 more mucous neck cells. The 

 rest of the stomach, with the 

 exception of the posterior third 

 in which the pyloric glands are 

 found, is occupied by the usual 

 tubular glands, consisting of 

 a body composed of granular 

 pepsin-forming cells, a neck 

 composed of transparent mu- 

 cous cells, and a duct composed 

 of cells resembling the surface 

 epithelium. These glands cor- 

 respond in all respects to the 

 excellent description given of 

 the corresponding structures 

 in Triton by Carlier (2). To 

 make clear the terminology 

 employed, a bi-tubular gland 

 is represented in Fig. i . 

 It was found necessary to resort to a new method of staining 

 the zymogen granules, as the conventional method, by the 

 employment of osmic acid, was not satisfactory when the cells 

 contained brown pigment, or a great deal of prozymogen, which, 

 as Langley (7) and Griitzner (3) point out, also reduces the 

 osmic acid, obscuring the granules if they be few in number or 



Body I 



FIG. i. Gastric gland of Amblystoma Jeffer- 

 sonianum. Zeiss apoch. 2 mm., ocular 2. 



