PAL/EONTOGRAPHICAL SOCIETY, 1912 



Lake, Cambrian Trilobites. 



PLATE X 



1X4 



2X4 



3X4 



,X4 



>/3**2 



9X4 





~~~_/<ir 



10 X 4 



8X4 



11X' 



CTENOPYGE. 



r.A.Brock.ael. 



London. Stereoscopic Co. 



