THE GASTIIIC MUCOHA 211 



animals under consideration that they probably have no 

 physiological significance. The peptic and oxyntic cells are 

 the most highly specialized. 



Literature. 



1. Bcnsley.— ' Quart. Journ. Micr. Sci.', 1898, xli. 361. 



2. Cade. — ' Arch, d'anat. micr.', 1907, iv. 1. 



3. Heidenhain.— ' Pfliiger's Arch.', 1878, xviii. 169. 



4. Klemensiewicz. — ' Jahrcsb. ii. d. Fort. d. Tierc^hcni.', 1875, v. 162. 



5. Langley and iSewall. — ' Journ. Physiol.', 1879, ii. 281. 



The expenses of this work were defrayed by grants from the 

 Carnegie Trust and from the Earl of Moray Fund for the 

 promotion of research in the University of Edinburgh. 



EXPLANATION OF PLATE 8. 



(All are from the cat.) 



Fig. 1. — A cross section of a gland-tube from the cardiac end of the 

 stomach along the lesser curvature, about 1 mm. from the oesophagus. 

 Animal killed fourteen hours after last meal. Acid formol fixation ; 

 stained with Mallory. 



Fig. 2. — A cross section of a gland-tube from the cardiac end of the 

 stomach along the lesser curvature, about 6 mm. from the oesophagus. 

 From the same preparation as fig. 1. m, mucoid ; p, peptic ; o, oxyntic. 

 These cells are in the resting condition. 



Fig. 3. — Cells from the glands of the middle region of the stomach. 

 s, surface mucus- secreting cells ; m, p, as in fig. 2. 



XX, Cat 20 ; 14 hrs. ; Altmann's fluid ; Mallory. The peptic cell on 

 the left is somewhat homogeneous (granules intact), while the cell on the 

 right shows the more usual reticulated appearance. Note the cytoplasm 

 of the mucoid cell. 



I, Cat 1 ; 1 hr. ; acid formol ; alcoholic eosin and methylene blue. 

 The granules in the peptic cell are imperfectly preserved ; the cytoplasju 

 stains intensely in a blotchy manner. Note the almost homogeneous 

 appearance of the mucoid cell. 



Ill, Cat 3 ; 6 hrs. ; acid formol ; very dilute polychrome methylene blue. 

 The peptic cell here shows well-marked ergastoplasmic fibres and zymogen 

 granules, and is in striking contrast with the mucoid cell. 



XXI a. Cat 21; 24 hrs. ; acid formol ; iron haematoxylin. 



