Phil. Trans. MDCCCLXII. PLATE XLI!I. 
Fi^. 16. 
Fig. 17. 
Fig. 16. 
Fig, 21. 
Division of dark-bordereil flliro, 
and fibres of sheatb. — Foniiation 
of network.— Pectoral. x 700 
Fig. 19. 
Division of dark.bordered fibre and network of fine fibres. — Pectoral mnscle. x 700 
irwinni . 
3. ad nat. del. 
1000 th : 
1000 th 
X 700 
Division of dark bordered fibres while crossing a muscular fibre. x 700 
[Harrison’s Jmpt. 
X 1700 
