708 
MR. J. N. LANGLEY ON THE HISTOLOGY AND 
DESCRIPTION OF FIGURES. 
Unless otherwise stated the specimens from which these drawings were made were prepared in the 
following manner. The tissue was placed for twenty-four hours in osmic acid 1 per cent.; removed from 
the osmic acid and washed for ten minutes in 50 per cent, alcohol, then placed for twenty-four hours in 
75 per cent, alcohol. The sections were mounted in a mixture of one part glycerine to one part water; 
they undergo after mounting certain slow changes ; the protoplasmic poi’tions become dai'ker, the mucigen 
portions more obvious, the outlines of the cells, nuclei and nucleoli, come more or less distinctly into 
view. It is almost unnecessary to point out that parts of several of the figures are drawn in outline only. 
PLATE 77. 
(Esophageal and Gastric Glands of Rana temporaria 
(Plate 77, figs. 1 to 11, and Plate 78, fig. 1). 
Figs. 1, 2, 3. To illustrate the transition from the oesophageal to the oxyntic glands. 
Fig. 1 . X 360. Oblique section of end-tube of oesophageal gland. The granules are 
large and vary somewhat in size. The outlines of the cells are indicated ; 
in the specimen they were only with difficulty to be made out. 
Fig. 2. X 250. Gland of the intermediate region. The form of the gland resembles 
the form of the oxyntic rather than that of the oesophageal glands; the 
granules are larger than the oxyntic gland granules, but smaller than those of 
the oesophageal glands ; they resemble closely the oesophageal gland granules. 
Some characters of the resting cylindrical and sub-cubical cells are also 
shown here. 
Fig. 3. X 370. Oxyntic gland, from latter part of anterior oxyntic region. The 
cells contain many granules, which are, however, much smaller than those 
in the cells of figs. 1 and 2. 
Tbe above three specimens were taken from a Frog (February, 1879) which had been fed 
with a large amount of food (0‘5 grm. worm) forty-six hour’s previously. The last remnants of 
the food were still in the stomach. All the glands have slight signs of activity, especially the 
glands of the intermediate regioD, in which a small outer zone is seen. 
Fig. 4. X 410. Longitudinal section of neck of oxyntic gland ; the specimen illus¬ 
trates also the changes which take place in the sub-cubical cells of the 
pyloric glands. Specimen prepared from a Frog (April, 1879) which was killed 
twenty-five hours after a heavy meal (four worms). The tissue was allowed 
to stay a month in alcohol before sections were cut, hence the distinctness 
of the interfibrillar substance (granules) in the mucigen portion. An earlier 
stage of this change in the mucigen portion of the cell can be seen in Plate 
78, fig. 1. 
