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255 



of the anterior lobe of the glabella and in others there is searcely 

 a trace of the ridges connecting the lobe above the eye, and the 

 anterior glabellar lobe. There is no special reason why Hohiiia 

 should not have continued on into Paradoxides time, but I do not 

 think it is proven to have done so by the specimen described by Mr. 

 Shimer. 



Fig. 10. 



Fig. II. 



Fig. 12. 



Fig. 13. 



Fig. 10. Cephalon of Paradoxides compressed in the St. Albans shale just west 

 of the city of St. Albans, Franklin Count}-, Vermont. U. S. National 

 Museum. 



11. Cephalon of Paradoxides from lentile of limestone in the St. Albans 



shale, at the same locality as fig. 10. U. S. National Museum. 



12. Specimen identified by H. W. Shimer [1907, p. 177I as " Oleiielliis 



(Hohiiia) broggeri." It should be compared with fig. 13. 



13. Cephalon of Paradoxides harlani Green from the Middle Cambrian at 



Braintree, Massachusetts. U. S. National Museum. 



