NOTE ON THE LYMPHATICS OF MUCOUS GLANDS. 387 



In such a case the gland seems as if invaginated in a 

 capacious lymphatic sinus, no special offshoots of the main 

 vessel running in between the lobules of the gland (fig. 3). 

 In the case of the nitrate of silver injection Ave Avere less 

 successful, though finally we obtained evidence of the pre- 

 sence of endothelial outlines round the glands. Owing to the 

 extreme delicacy of these endothelial membranes the chances 

 were small of obtaining a section in the plane of the mem- 

 branes which should give a surface- view of the silver-stained 

 endothelium. 



Although thick sections were made to increase the chances 

 of getting such a view, no very characteristic appearances 

 were obtained. But large lymph-vessels Avere seen in close 

 proximity to the glands, and in some cases fine endothelial 

 markings were noticed here and there around the lobules. 

 Sections of an uninjected dog's pharynx hardened in a mix- 

 ture consisting of chromic acid ^ per cent. 2 parts, and spirit 

 1 part, confirmed the results of our injections. 



Here the mucous glands were seen to be surrounded by 

 larger or smaller spaces limited by fine lines in Avhich Avere set 

 oblong nuclei at regular intervals, reminding one exactly of 

 the profile appearance of an endothelial membrane. Here 

 also the distribution of these lymph-vessels or spaces varied 

 someAvhat in different groups of glands. In some the lymph- 

 vessel Avas continued into the interior of the gland around 

 individual lobules, in others the lymphatic sheath was throAvn 

 loosely around the entire gland. In some cases the ducts of 

 the glands were also provided Avith a sheath continuous Avith 

 that surrounding the lobules. 



A similar arrangement prevailed in the mucous glands of 

 the oesophagus. 



Teichmann moreover denies that the mucous glands of 

 the tongue have any lymph-vessels. Here again our results 

 are at variance with his. The appearances observed on the 

 tongue resemble closely those seen in the pharynx, the 

 mucous glands of the tongue being provided with similar 

 encircling spaces lined by endothelial membranes w^th regu- 

 larly disposed oblong nuclei. 



We have not investigated other mucous glands than those 

 here specified, but it Avould seem that in all probability a 

 similar arrangement of the lymph-vessels obtains in all 

 mucous glands. This would be in accordance Avith Leopold's 

 researches on the glands of the uterus, which he finds are 

 invaginated in lymphatic sheaths. ("Die Lymi)hgefasse des 

 normalen nicht schAvangeren Uterus," 'Arch. f.Gynaekologie,' 

 Bd. vi) . Moreover, this would also fit in with Gianuzzi's inves- 



