lUuL. U. S. B. K.. igi»>-;;ix 



in.ATi: XXl. 



Lt.nu« 



lUOilti 



Ant«r>di 



14 a%«Sof UVk>«wi<^ 



^uu..t>ji muscle 









r««j 





Vis^ci ak m&^s 



1^ , 



Umar rijht 54" 



Fk. I. — Tbc stiuctttie of a f R^sb-vmtrr massri. ^Based uixn Jmwiui oj" white h«v)ss|)titttT. Sr^Myo^^ fi"»A<«««*i. 



ftvva Lefevre and CUrtts. t^ii.) 



Fjg- c- — ^A lool which, if eiiipJo>'«vl with care. ma>- be nsevl K>f i\«t ijiUy ov^entn^ living mui.»<l> Uir ex«u2uiidttuu U cv«Ki4liuti> 



-within the :>h«U. 



