BIGSBY PALAEOZOIC ROCKS OF NEW YORK. 



421 



Table III. — The Recurrent Fossils of Trenton Limestone. 



Fossils. 



Graptolites pristis 



bicomis 



scalaris 



Sagittarius 



Chaetetes columnaris 



sp. ind 



Stromatopora concentrica , 



Orbicula lamellosa 1 



Leptaena alternata 



depressa , 



imbrex 



sericea 



(Stroph.) grandis 



Ortbis parva 



testudinaria 



striatula 



Atrypa increbrescens 



modesta 



Terebratula bidentata 



Ambonychia, sp. ind 



Tellinomya machaerifonnis 

 Modiolopsis anodontoides 



modiolaris 



Nucula levata 



poststriata 



Murcbisonia uniangulata... 



Bellerophon bilobatus 



Trocbobtes ammonius 



Orthoceras vertebratum . . . 



Ampyx 



Calymene Beckii 



punctata 



Platynotus Trentonensis... 



Isotelus gigas 



Phacops limulurus 



Dalmanni 



Trinucleus Caractaci 



concentricus 



* * 



* * 



.. * 



* 



.. * 



.. * 



.. * 



,.. * 

 # 



... * 



,.. * 



a 



5.2 

 o 



-a 



3 



— 



1 And in Genesee Slate. 



