PLATE 10 



Phacops log-ani (Hall) Clarke 



Page 118 



1-4 Small cephala with spinules at the genal angles 

 7, 8 Pygidia enlarged ; 7, x 2 ; 8, x 3 



9 An enrolled individual viewed in profile, x 2 

 Grande Grevc livicstonc. Perce Rock 



Phacops logani Hall van gaspensis no v. 



Page iig 



5 A small pygidium. x 2 



6 A large pygidium 



10 A group of individuals preserved as internal casts on chert and 

 showing the rows of tubercles along the dorsal furrows 

 11-13 Three views of a large coarsely tubercled cephalon having the 



character of Phacops b o m b i f r o n s Hall 

 14, 15 Two views of a similar specimen 



Grande Grcvc iinicstone. Various outcrops along the Forillon 



16 Thorax and pygidium 



St Alban beds. Grande Cavee of Griffon Cove river 



Phacops (Phacopidella) correlator Clarke 



Page 22fi 



17 Exterior of an entire cephalon. x 3 



18 Internal cast of a cephalon with the margin cut away to show doublure. 



X 3 

 Gaspe sandstone. Gaspe Basin 



272 



