78 C. F. MARSHALL. 



fibre and uerve-eudiug are stretched out transversely more than 

 in the normal state. The nerve-ending appears to have been 

 broken ofl: from the upper part of the network and tilted over to 

 show its inner surface^ which here appears to be connected with 

 the longitudinal bars of the network. The upper border of the 

 nerve-ending, in the position of the figure, I take to be the 

 external surface next the sarcolemma, the lower border to be 

 the internal surface ; the outline of the latter seems to me to 

 point strongly to the fact that it is really connected with the 

 longitudinal bars of the network. 



Crayfish. — In preparations of crayfish muscle there are 

 frequently found what I may, for want of a better term, call 

 " streaks ^^ of slightly stained matter usually crossing the fibre 

 transversely. In some preparations these are seen to be dis- 

 tinctly continuous with the nerve-fibre going to the muscle, 

 and are hence presumably portions of the nerve-ending. They 

 appear to correspond to the lighter stained part of the uerve- 

 endings as usually seen. 



In several specimens these streaks appeared to be connected 

 with the longitudinal bars of the network, in the same way as 

 in the specimen of Dytiscus muscle. Fig. 13 shows one of 

 these streaks of nerve-ending connected with the network. 

 The reason that these are so much stretched out appears 

 to be on account of their connection with the network, which 

 stretches them with it when it becomes stretched itself. In 

 this figure the triangular deeply-stained bodies appear to 

 represent the deeper stained part of the normal nerve-ending. 

 They also appear to be continuous with the network at their 

 apices. 



Although the above results are imperfect, and not so con- 

 clusive as those discussed in the previous portions of this 

 paper, nevertheless it appears to me that the nerve-ending is 

 connected with the muscle-network, and apparently chiefly 

 with the longitudinal fibrils of the network. 



A recent paper by Macallum^ on the termination of nerves 

 in the liver of Menobranchus has an important relation 

 ' ' Quart. Jouiii. Micr. Sci.,' Marcb, 1887. 



