34 



cular fibre is hardly possible, as one sees many, even by the fullest 

 impregnation, that are not touched by any fibre. 



"Accordingly we have here a species of motor ending that is very 

 similar to the simplest form of termination for voluntary muscle, and 

 still more like that of worms, and on the whole very similar to 

 that of the unstriated muscular tissue. No endings in the interior of 

 the muscular cell are demonstrable, and no end -plates are present." 



S. Ramon t Cajal l ) in a personal communication to the Swedish 

 investigator, also states that there are no end-plates in the heart 

 tissues of mammalia. 



Arnstein 2 ) using the methylene blue method, finds two connected 

 plexuses in the ventricle muscle; from the finer depart isolated vari- 

 cose filaments which may be followed long distances, and their termi- 

 nations are to be found situated on the muscular cells, without forming 

 end-swellings. 



Koelliker 3 ), Schweig gee- Seidel 4 ), and Langerhans 5 ) saw the 

 fine fibrillae in the heart muscle running parallel to the muscular 

 bundles and ending in very fine pointed filaments without entering the 

 muscular cells, in the same manner as occurs in unstried muscular tissues. 



Krause 6 ) states that the double contoured nerve fibres of the 

 heart muscle end in terminal plates. 



Klug 7 ) finds in the ventricle wall pale and double contoured nerve 

 fibres but no ganglion cells. 



Friedländer 8 ) is the only author that even makes mention of 

 ganglion cells in the upper third of the ventricles, but his article is 

 unfortunately not accessible to us and we make the citation from 

 Klug. 



Quite recently, we have studied the nerve structures of the mus- 

 cular wall of the heart ventricle in the mouse and white rat with the 

 rapid Golgi and Picric-acid-osmium-bichromate methods, and have 

 found some differences between our results and those obtained by 

 Retzius and Cajal. Our investigations are unfinished in so far that 

 we have obtained more or less complete impregnations in only about 



1) Cited by Retzius. 



2) Abnstein, Anat. Anz., 1887, No. 5. 



3) Koellieeb, Gewebelehre. 



4) Steickee's Handbuch. 



5) Langeehans, Viechow's Arch., 1873. 



6) Anat. d. Kaninchens. 



7) Arch. f. Anat. u. Phys., 1881, Anat. Abt. 



8) Unters, aus d. phys. Lab. in Würzburg, 1867, p. 159. 



