102 NOTES AND MEMORANDA. 



flattened connective-tissue corpuscles. The above arrange- 

 ment of the layers of the peritoneum holds good for the 

 peritendinous zone of the (liaphragm. In the peripheral 

 (muscular) parts it has no lacunae, or they are very sparing. 

 Over the central tendon it is thinner, and its various layers 

 are more intimately fused together, the lacunse being repre- 

 sented by a series of canals forming a network, with dilata- 

 tions here and there. 



Lymphatic vessels. — These were studied by absorption of 

 Indian ink suspended in salt solution, and also injected by 

 puncture with Prussian blue. On examination it was found 

 that the granules of Indian ink occupied the lacunae which 

 occur in the reticular stratum of the basement layer, and 

 from which lymphatic vessels of two kinds start. The first 

 kind pass over the walls of the lacuna from which they start, 

 and open into neighbouring lacunae, often after anastomosing 

 with neighbouring lymphatics. They thus form a very 

 superficial network. The second kind of lymphatic vessels 

 are larger, and starting from the lacunae pass into the depth 

 of the compact stratum of the basement layer, where they 

 become ampullated, and give origin to the large lymphatic 

 trunks of the serosa. The Indian ink enters the lacunae 

 through the apertures of the membrana limitans, around 

 Avhich its granules are found to accumulate. The walls of 

 the lacunae are lined by endothelium, which appears to 

 occlude the apertures in the membrana limitans ; but this 

 point was found difficult to settle, o«'ing to the subjects of 

 study not being perfectly fresh. — E. Klein. 



The Lymphatics of the Bones. By Dr. Albrecht Budge. 

 (' Archir. f. microsc. Anatomic,' Bd. xiii. Edited by V. La 

 Valette St. George, and W. Waldeyer.) By injections with 

 Berlin blue by " ])uncture" into the periosteum of meta- 

 tarsus of calf and cow, it can be proved that the blood-vessels 

 of Haversian canals are surrounded by perivascular Ivn)- 

 phatic vessels (injected). The larger Haversian canals may 

 be shown to possess special lymphatic vessels with proper 

 walls, which (vessels) can be injected directly from the 

 lymphatics of the periostetim. The injection further ])roves 

 that the bone lacunae (bone corpuscles) are directly con- 

 nected with the perivascular lymphatics by their canaliculi. 

 Budge thus shows by direct injection that the radicals of the 

 lymphatics of bone are identical with the bone lacunae (bone 

 corpuscles), these lead by their canaliculi into the ])erivascular 

 lymphatics of the Haversian canals, and these empty them- 

 selves into the lymphatics of the periosteum. — E. Klein. 



