THE HAMILTON ASSOCIATION. 1 33 



CRUSTACEA. 



TRILOBATA. 

 Genera and Species. Author-ity and Reference. 



lUsenus barriensis , Murch,, 1838, Sil. Syst. 



Encrinurus ornatus .... Hall, 1852 



Sphasrexochus Vomingeri Hall, 1867, 20th Rep., Pal. N. Y. 



Calymene Blumenbachii Brogniart, 1822, Nat. His. 



Homalonotus delphinocephalus , Green, 1832 



Dalmanites limulurus " " 



Lichas Boltoni Bigsby, 1825, Jour. Nat. Sc. 



Acidaspis Halli Spencer, 1880, Niag. Foss. 



Dalmania Verrucosa Hall 



Dalmania vigilans 



Acidaspis — 3 .species 



EURIPTERID/E. 



Pterygotus Canadensis Dawson, 1879, Can. Nat. 



PLANTS. 



Buthotrephis Granti Dawson 



Three others undescribed — two from Barton and one from 

 Pentamerus bed, Hamilton. 



CLINTON FOSSILS, HAMILTON, ONT. 



Genera, and Species. ^ Reference. 



Buthotrephis gracilis - Hall, Pal. N. Y., 185 



" var. crassa 



" var. palmata 



Roots, various Algje 



Stromatopora Sp. 



Conophyllum Niagarense . . , 



Zaphrentis bilateralis 



Graptolithus Clintonensis 



Reteolites venosus ; 



Helopora fragilis , . . . 



Clathropora frondosa 



Polypora incepta 



