HEMOLYMPH NODES AND ACCESSOKY SPLEENS 255 



Freytag further reported that l3Tiiph nodes respond as early 

 as five weeks after splenectomy, that after bleeding in the rabbit 

 small (0.75 cm.) ''preformed splenic Anlagen" are found near 

 the hilus of the main spleen, and that if these are removed at 

 the time of operation negative results are obtained. He also 

 stated in contradiction to the above investigators that red lymph 

 nodes develop from the mesentery sixteen to nineteen weeks after 

 splenectomy in a place one-half centimeter from the place where 

 the spleen was excised, and that such can be produced in four 

 weeks by bleeding. Still farther on it is stated that glands de- 

 velop from Jat and Freytag thinks hemal nodes may be trans- 

 formed into spleens easier than lymph nodes. 



It was stated above that although hemolymph nodes were not 

 formed in any of these dogs in two instances nodes of unusual 

 appearances were nevertheless found. In dog i, for example, 

 a female killed by illuminating gas, thirty days after operation, 

 the pubo-inguinal, abdominal, axillary and cervical lymph nodes 

 were normal, but two large (1 X 0.75 X 0.5 cms.) bronchial nodes 

 lying dorsal to the root of the left lung were intensely red and 

 all the visible afferent and efferent vessels engorged with blood. 

 The many — about a dozen — fine, straight, afferent trunks which 

 were only 0.25 to 0.75 mm. in caliber and about 1.5 cm. long were 

 plainly visible up to the lung which they entered. Two larger 

 (1.5 mm.) efferent trunks which were likewise engorged with 

 blood, left these two nodes and joined the larger mediastinal 

 vessels which empty into the main lymphatic vessels near the 

 jugulo-subclavian junction. There also were two reddish nodes 

 similarly placed on the right side. These had similar connec- 

 tions but the efferent trunk of one joined a more centrally placed 

 mediastinal node near the apex of the thorax before joining the 

 larger collecting trunks. The other node which lay nearer the 

 root of the lung was large (1 X 0.5 cm.), flat, oval and joined by 

 twelve to fifteen extremely fine blood-filled lymphatics which 

 also seemed to have a sub-pleural origin. 



In the other dog — No. iii, also a female — killed fifty- three 

 days after operation the pubo-inguinal, abdominal, axillary and 

 cervical nodes were normal in appearance but the bronchial nodes 



