574 [May 21, 



observers may adopt this view until they have an opportunity of 

 seeing the fibres themselves. 



8. Of the ganglion-cells of the heart. 



The author's conclusions are quite opposed to those of Kolliker, 

 who states that all the cells are unipolar, and that the fibre always 

 passes in a peripheral direction, also that the transcurrent fibres of 

 the vagus have no connexion with these cells. The author, on the 

 contrary, affirms that the cells have at least two fibres coming from 

 them, that some of the fibres pass towards the heart, and others to- 

 wards the brain. He regards it as very probable that many at least 

 of these ganglion-cells are connected with fibres of the vagus. Kolliker 

 has also stated (1860) that many apolar cells could be seen in the 

 heart, ganglia, and in the bladder. The author has been able to 

 demonstrate fibres in connexion with so many cells which appeared 

 devoid of fibres, that he considers himself justified in denying the 

 existence of apolar and unipolar cells altogether. 



Next follow some observations on " the ganglion-cells and nerves 

 of arteries ;" " on the connexion of the ganglion-cells with each 

 other ;" and the paper concludes with a description of the so-called 

 "capsule" of the ganglion-cell, and a discussion on the nature and 

 formation of the connective tissue and its corpuscles in the immediate 

 neighbourhood of nerve-fibres. 



The paper is illustrated with forty-seven drawings of the specimens, 

 magnified from 700 to 1 700 linear ; and the author states that many 

 of the specimens will probably retain the appearances he has copied 

 for several months. All the preparations have been made in the 

 same manner. An outline of the process has been already given in 

 the author's previous communications, but the author is aware that 

 it may be some time before the correctness of his conclusions is 

 generally admitted, in consequence of the difficulty of preparing 

 demonstrative specimens. 



