PLATE VI. 
REGENERATION OF STRIATED MUSCLE. 
Iie. 20. Regeneration, 10 days, 6 hours. Showing the muscle fibrils form- 
ing brush-like end pieces in their attachment to the chitin. Epidermal mem- 
brane (em) just beginning to differentiate. > 1250. 
Fic. 21. Completely regenerated epidermis in the chela of a sixth stage 
lobster just after moulting, showing a nucleus (ng) of the “grenzlamelle,” 
and the relation of the “grenzlamelle” to the epidermis and muscle fibers. 
< 750. 
Vig. 22. Regeneration, 6 days, 2 hours. Showing the close relation of the 
myofibrillae (mf) to the cytoplasmic reticulum (rt) during early differentia- 
tion. > 1250. 
Fic. 28. Regeneration, 7 days, 6 hours. Myofibrillae (mf) surrounded by 
a sheath of modified cytoplasm (transverse section). 1250. 
Via. 24. Regeneration, 8 days, 10 hours. Transverse section of myofi- 
brillae (mf), Showing the first longitudinal splitting of the fibrils. >< 1250. 
ia. 25. Regeneration, 11 days, 10 hours. Transverse section of a fully 
formed muscle fiber showing membrane or sarcolemma (sq@), nuclei, and Cohn- 
heim’s areas. >< 1250. 
