Huber-DeWitt, Nerve-Endings in Muscles. 179 



which the sections were further stained in alum carmine, noth- 

 ing is seen of a granular sole; as, for instance, Figs, i, 3, 4 

 and 5 may serve to show. In longitudinal or cross sections of 

 the motor endings in rabbit's muscle (stained as above indi- 

 cated) what has been described as a granular sole may be ob- 

 served as a nearly homogeneous substance, continuous with the 

 sarcoplasma found between the muscle fibrillae and staining in 

 every way like it, as may be seen in Fig. 6 to 11. 



Such observations have led to the conclusion that what has 

 been described as the granular sole may be regarded as an ac- 

 cumulation of sarcoplasma continuous with the sarcoplasma of 

 the muscle. The nuclei of the sole are in structure very sim- 

 ilar to the muscle nuclei, and we have regarded them as such. 

 As our figures may serve to show, especially those showing a 

 longitudinal or cross section of the motorial end-plate, the 

 branches of the axis cylinder — the end-brush of the neuraxis 

 of a motor neuron — terminate in this mass of sarcoplasma, the 

 muscle nuclei, which are here found in relatively large numbers, 

 being both above and below the terminal branches of the axis 

 cyUnder. Schafer states that "applied to the branches of the 

 ramifications, small granular nuclei are seen at intervals ; these 

 nuclei of the arborization are different from the clear nuclei, of 

 the bed and also from the flattened nuclei of the sheath, which 

 lie directly under the sarcolemma covering the end-plate, and 

 which resemble the nuclei of the sheath of Schwann covering 

 the nerve." Nuclei applied to the branches of the axis cyhnder 

 have also been described by Ranvier and Kolliker, while Kiihne 

 does not recognize them. In none of our preparations made 

 from rabbit's muscle were such nuclei {GciueiJi-kerne^ seen. In 

 our sections, nuclei which seemed in very close apposition to 

 some one of the terminal branches, were now and then seen. 

 Such nuclei had not, however, a distinctive structure. 



The telolemma nuclei described by Kuhne and others, were 

 now and then recognized in our sections. They are more oblong 

 and stain more deeply than the muscle nuclei. See /, n, of 

 Figs. 3, 4, 5, 7. 9 and 11, 



