160 DR. E. KLEIN. 



Wolffian bodj', as I have shown in a former paper {' Quarterly 

 Journal of Microscopical Science/ April, 1879), and in the 

 second place the interstitial cells of the sublingualis of the dog 

 are ordinary lymph-corpuscles differing from those of the testis 

 both in size and appearance ; {b) in the rabbit occur a few 

 lymph-corpuscles in the interlobular tissue, and the wall of the 

 chief duct contains numerous such cells ; (c) in the guinea-pig 

 the wall of the chief duct is likewise supplied with ordinary 

 lymph-corpuscles. The inter- and intralobular tissue contains 

 very numerous oval nuclei, but these are not the nuclei of 

 lymph-corpuscles, but of endotheloid connective-tissue cells. 

 There are present in the intralobular tissue also ordinary lymph- 

 cells, differing in numbers in the various lobules. 



4. In the pancreas : (a) in the dog there occur occasionally a 

 few plasma-cells ; the ordinary lymph-corpuscles, however, are 

 more numerous ; in one animal I found diffuse adenoid tissue 

 present in considerable amount, both in the inter- and intra- 

 lobular tissue ; {b) in man the ordinary lymph-corpuscles are 

 met with both in the inter- and intralobular tissue ; [c) in the 

 guinea-pig a few plasma-cells are seen in the tissue immediately 

 surrounding the larger interlobular ducts ; in the intralobular 

 tissue a few isolated ordinary lymph-corpuscles may be occasion- 

 ally met with. 



B. T/ie Lymphatics, 



Gianuzzi^ was the first to show that the alveoli are sur- 

 rounded by lymph-spaces for the greater part of their circum- 

 ference; this has been fully confirmed by Heidenhain, Boll, and 

 others. These lymph-spaces, according to Heidenhain,^ " open 

 into larger interlobular lymph-clefts, and these communicate 

 with the circumvascular lymph-paths surrounding the larger 

 arteries and veins, and finally pass into the lymphatic vessels of 

 the hilum." I have convinced myself in all the salivary glands 

 that I have examined, viz. the parotid of the dog, ape, rabbit, 

 and guinea-pig ; the submaxillary of man, ape, dog, rabbit, and 

 guinea-pig ; the sublingual gland of the dog, rabbit, and guinea- 

 pig ; the pancreas of man, dog, and guinea-pig ; in injected and 

 uninjected specimens, in fresh and hardened cedematous and 

 non-ccdematous glands, that the above inter- or rather circum- 

 alveolar spaces are really connected with lymphatic vessels. As 

 has been mentioned above, the interalveolar tissue, with the 

 capillary blood-vessels embedded in it, forms the outer, the 

 membrana propria of the alveoli the inner, limit of these 

 spaces. But I cannot accept the general statement of Heideu- 



J ' Berichte d. Siiclis. Ges. d. Wiss.,' 27th November, 1865. 

 - Hermann's ' Physiologie,' v, p. 2.9. 



