20 



Mr. J. N. Langley. 



[Apr. 27, 



April 27, 1882. 



THE PRESIDENT in the Chair. 



The Presents received were laid on the table, and thanks ordered for 

 them. 



The Right Hon. Lord Bramwell and Dr. Ramsay H. Traquair were 

 admitted into the Society. 



The following Papers were read : — 



I. " On the Attitudes of Animals in Motion." By Eadweard 



Mutbridge, of Palo Alto, California. Communicated by 

 The President. Received April 20, 1882. 



II. " Preliminary Account of the Structure of the Cells of the 



Liver, and the Changes which take place in them under 

 Various Conditions." By J. N. Langley, M.A., Fellow of 

 Trinity College, Cambridge. Communicated by Dr. 

 Michael Foster, Sec. R.S. Received April 24, 1882. 



I have examined the structure of the liver-cells in the frog, toad, 

 newt, the common snake, the grey lizard, the roach and smelt, the 

 pigeon, and various mammals. In all these the " resting " liver cells 

 have the following common points of structure. 



The protoplasm is arranged in the form of a network or honeycomb, 

 the meshes or spaces of which are in all parts of the cell of much the 

 same size ; the outer parts of the cell are formed of a thin layer of 

 slightly modified protoplasm with which, however, the network is 

 continuous. 



The spaces of the protoplasmic network are occupied by paraplasm 

 or interfibrillar substance, consisting of (1) spherical granules, pro- 

 bably proteid in nature ; (2) spherical globules of fat; (3) hyaline sub- 

 stance, tilling up the spaces not occupied by the granules or globules. 

 This substance consists partly of glycogen and in part probably of a 

 proteid. 



This description differs in several points from those given by pre- 

 vious observers. The account given by Klein* resembles it more 



* Klein, " Quart. Journ. Med. Sc.," N.S., xix, p. 161, 1879. 



