ON THE LYMPHATIC SYSTEM. 155 



Ileidenhain^ says of the iuteralveolar and interlobular con- 

 nective tissue of the salivary glands that it does not present 

 any features of special interest. In the connective tissue between 

 the acini he finds sometimes few, sometimes numerous cells, 

 which are either lymph-corpuscles or the large granular cells, 

 called Waldeyer's plasma-cells. 



])oll'' finds between the alveoli, besides the branched cells 

 forming the membrana propria of the alveoli, broader or 

 narrower fibres and stellate cells. In the interstices of the 

 alveoli, especially of stimulated glands, occur numerous lymph- 

 corpuscles. He did not succeed in identifying these as emi- 

 grated white blood-corpuscles. 



Lavdowsky^ confirms Heidenhain's* and BolFs assertions as to 

 the presence of lymph- corpuscles in the tissue between the alveoli. 

 In the true salivary glands^(the serous or albuminous glands of 

 Heidenhain) he misses them; in the mucous glands, e.g. the 

 orbital gland of the dog, most of them are identical with Wal- 

 deyer's plasma-cells. In the sublingual gland they, viz. the 

 plasma cells, are so numerous that they form continuous streaks 

 between the alveoli. Lavdowsky confirms Boll in saying that 

 the ordinary small lymph-corpuscles are most numerous in 

 stimulated glands. I shall have to correct this statement below 

 about the plasma-cells. 



The results of my own observations are these : the amount of the 

 connective tissue separating the lobes or the groups of lobules, 

 and further the individual lobules, and supporting the inter- 

 lobular ducts and vessels, is subject to considerable variations in 

 the different glands, but in all instances it, viz. the interlobular 

 connective tissue, is proportionate to that penetrating into the 

 interior of the lobules, i. e. with the chief duct and vessels. 

 While in the submaxillary gland of man, and in the parotid 

 of the ape, but especially in the parotid of the dog, most 

 of the lobules are surrounded by a well-developed capsule of 

 connective tissue, those of the other salivary glands are 

 separated in many places only by dehcate trabeculse of fibrous 

 tissue. In a section through the hardened parotid of the dog, 

 the submaxillary of man or the ape, the connective tissue around 

 the large ducts and vessels appears of the same nature as in 

 other localities and organs where fibrous tissue is arranged in 

 continuous and compact masses, i. e. groups of bundles or tra- 



1 Hermann's 'Handbuch d. Physiologie,' v., p. 29. 



' "Die Bindesubstauz d. Driisen," 'Archiv f. mikr. Anatomic,' Band v, 

 pp. 334-356. 



3 "Zur fein. Anat. uud Physiol, d, Speicheldriisen," ' Archiv f. mikr., 

 Anat.,' Baud 13, p. 317. 



* ' Studien d. Phjs, Inst, zu Breslau,* iv, 1868. 



