Memoirs Carnegie Museum, Vol. VII. 



Plate XLVII. 



irf.'c- V'iis& 



"'•*'*»*"•.«**.*#.;.■., 



"O-*^ ^»^;^__j;ff=^^s 



/e iw 



s** ^^_ 



^ 



/a, 



Pygidium. 

 (For detailed explanation see opposite page.) 



