THE STORY OF OUR ROCK FOUNDATION 



49 



AKF^ 



FIG. 34. Animal fossils from Niagara limestone in the Chicago region. 

 a, a coral, Favosites niagarensis Hall; 6, Phraginoceras neslor Hall; c, Penlamerus 

 oblongus Sowerby; d, a trilobite, Calymene celebra Raymond; e, Amphicoelia 

 neglecta McChesney; / and g, crinoids: /, Eucalyptocrinus as per Weller; 

 g, Caryocrinites ornatus Say; h, Strophostylus levatus Hall; i, a straight-shelled 

 cephalopod, Dawsonocerus annulatum Sowerby. Photo by Fenton. 



