OBSERVATIONS ON STRIPED AND UNSTRIPED MUSCLE. 107 



ing intranuclear network and its connection with the fibrils of the cell. 

 (5 per cent. amm. chromate twenty-four hours ; logwood.) -^ imm. obj. 



Fig. 13. — Part of fibre from bladder of Salamander, showing fibrils. Usual 

 gold method, y 1 ^ imm. obj. 



Fig. 14 a. — Muscle-fibre of Dytiscus, stimulated with alcohol vapour. 

 Portion a relaxed, b. Contracted. -^ obj. 



Fig. 14 b. — Network of relaxed portion. ^ imm. obj. 

 Fig. 14 c. — Network of contracted portion. -^ imm. obj. 



Fig. 15. — Diagram of a muscle-fibre, showing change in network during 

 contraction. 



Fig. 16. — Diagram of the intracellular network of striped muscle, a. 

 The transverse networks, b. The longitudinal bars of the network. (Copied 

 from Melland, loc. cit., Diag. 1.) 



Fig. 17. — Portion of network on a larger scale. (Copied from Melland, 

 loc. cit., Diag. 2.) 



Fig. 18. — Portion of muscle-fibre of Dytiscus, showing the network very 

 plainly. One of the transverse networks is split off, and some of the longi- 

 tudinal bars are shown broken off. (Copied from Melland, loc. cit., fig. 6.) 



Fig. 19. — Hypothetical diagram of the termination of nerve in muscle- 

 fibre and the connection with the network ; based on views discussed in the 

 paper. S. Sheath of Schwann, continuous with sarcolemma. n. Axis- 

 cylinder branching and connected with muscle-corpuscles, m. Muscle- 

 corpuscles connected with transverse networks. 



