![]() Middle Devonian Spongiozoana Sphaerospongii tesselata p. 597 Manitoba  | 
      ![]() Middle Devonian Polyp-Coral Heliophyllum p. 597 Canandaigua, N.Y.  | 
    
![]() Middle Devonian Brachiopod p. 598 Atrypa  | 
      ![]() Middle Devonian Brachiopod Spirifer Pennatus p.598  | 
    
![]() Middle Devonian Nautiloid Cephalapod Goniatites p. 599 can exceed 1 ft. in diameter  | 
      ![]() Middle Devonian Trilobite Phacops rana p. 599 length to 8".  | 
    
![]() Middle Devonian Phyllopod Echinocaris p. 600 length to 8" Canandaigua Lake N.Y.  | 
      ![]() Middle Devonian Insect Xenoneura p. 600 wing spread to 5" St. Johns, New Brunswick related to Mayflies  |