Pig. u. 
Phil. Trans. .MDGOCLXII. PLATE XLII. 
d 
• iiion of <)ark-bor<lerv<i fibre* on surface of a muscular fibre. x 7(H) 
Fig. li. 
X 700 
• f daik'bordered oucleated fibre—at d a dark-bordered fibre contracts so as to form a very thin scarcely visible line- 
nuclei in dark-bordered fibres, x 700 
Fig. 13. 
Pig. 12, 
All these fierures frr.m the pectoral muscle of the frog. 
Division of clark.hordered fihres 
and pale fibres of sheath, x 700 
nat. del, 
1000 th I I ■ 
1000 th I 
.t- J -a-l-i X 700 
X 1700 
[Hairrison’s Irepl . 
