188 Finer Structure of the Glandula Submaxillaris 
glands the granule-containing cells are oxyphilic and the non-granular 
basophilic. When fresh sections are placed in a one per cent solution 
of pyrogallic acid in both glands the rodded epithelium of the ducts and 
the granule-containing cells are stained a lively brown, while the second 
kind of cell manifests no reaction. Merkel, 83, employed pyrogallic 
acid to demonstrate the presence of calcium salts microchemically in the 
salivary glands. Hence Krause concluded that the granule-containing 
cells secrete the bulk of the lime salts and albumin of the submaxillary 
saliva of the hedgehog. On the other hand sections of the rabbit’s sub- 
maxillary when treated with a solution of ammonium purpurate for the 
detection of calcium salts failed to show the presence of calcium either 
in the cells of the ducts or of the granular areas. A brown coloration 
with pyrogallic acid cannot be regarded as a test for the presence of 
calcium. 
That both glands when treated with Krause’s mucin stain give a 
similar reaction has been already mentioned in the present paper. In 
the hedgehog the granular (serous) cells stain a weak blue and the non- 
granular mucinoid cells take on the simple metachromatic red color 
characteristic of mucin. The submaxillary of the rabbit when treated 
with this stain gave a similar result; the granular cells stained blue 
and the clear cells a metachromatic red. Although this stain, as before 
pointed out, is not specific for mucin, it nevertheless serves to indicate 
a similarity in the chemical composition of the cytoplasm in the corres- 
ponding cells of these two glands. 
In concluding it is a pleasure to thank Professor R. R. Bensley for 
the many valuable suggestions offered during the preparation of the 
present paper. 
LITERATURE CITED. 
BENSLEY, R. R., 02.—The Cardiac Glands of Mammals. Am. Journ. Anat., 
Baltimore, Vol. II, No. 1, pp. 105-156, 1902. 
03.—The Structure of the Glands of Brunner. The Decennial Publica- 
tions of the University of Chicago, Vol. X, Chicago, 1903. 
BERMANN, I., 78.—Ueber die Zusammensetzung der Glandula submaxillaris 
aus verschiedenen Driisenformen und deren funktionelle Struktur- 
verinderungen. Wurzburg, 1878. 
Bryer, G., 79.—Die Glandula sublingualis, ihr histologischer Bau und ihre 
funktionellen Veranderungen. Inaug. Diss., Breslau, 1879. 
Bott, F., 69.—Die Bindesubstanz der Drtisen. Arch. f. mikr. Anat., Bonn, Bd. 
5, S. 334-355, 1869. 
