MEMOIRS. 
On the Lympnuatic System of the Sxin and Mucovs 
Mrmpranes. By E. Krein, M.D., F.R.S. (With 
Plates XXI and XXII.) 
(From the Report of the Medical Officer of the Local Government Board 
for 1879.) 
In No. III (New Series) of the Reports of the Medical 
Officer of the Privy Council and Local Government Board, 
I have given an extensive summary of an anatomical in- 
vestigation of the lymphatic system of the serous membranes 
and the lung, carried on during 1871 and 1872, with special 
reference to the process of chronic infective inflammation and 
tuberculosis. 
These investigations having been published in an extended 
form, with the sanction of the then Medical Officer, and by 
the aid of the Royal Society, as ‘The Anatomy of the 
Lymphatic System.’ Part I, “ The Serous Membranes,” 1878 ; 
part IT, “ The lung,” 1875. 
With the permission of the late Dr. Seaton and the present 
Medical Officer, I have been able to resume these investi- 
gations and to extend them, during the past two years, to 
the lymphatic system of the skin and mucous membranes, 
and on these I propose to report in the following pages. 
I.—Tuer LyMPuHATics OF THE SKIN OF MAN AND 
MAMMALS. 
1. In accordance with the observations of Teichmann, 
published in his classical work: ‘Das Saugadersystem vom 
anatomischen Standpunkte,’ Leipzig, 1861 ; also I. Neumann, 
in his recent investigations of the lymphatics of the skin 
(‘Zur Kenntniss der Lymphgefasse der Haut,’ &c., Vienna, 
1875), distinguishes the superficial from the deep-seated 
lymphatics, both forming a plexus, 7.e. the superficial and 
the deep plexus. ‘The former is denser and its vessels finer 
than in the latter. G. and F. Hoggan (‘ Proceedings of the 
VOL. XXI,—NEW SER. CC 
