MARCELLUS LIMESTONES OF LANCASTER 153 



Trematospira gibbosa Hall rr 



Meristella barrisi Hall cc 



Panenka mollis Hall rr 



Cypricardinia indenta (Conrad) rr 



Styliolina fissurella (Hall) c 



Tentaculites gracilistriatus (Hall) rr 



Orthoceras marcellense Tanuxem c 



O. fenestrulatum Clarke rr 



Pbacops rana {Green) r 



Primitiopsis punetulifera {Hall) r 



Marcellus shale 



F 18 inches. Overlying the upper limestone bed is a fissile 

 gray shale, some parts of which are heavy bedded. It contains 

 Ambocoelia umbonata and Styliolina fissu- 

 rella in great abundance, the former standing out in relief on 

 the weathered surfaces. Species identified are: 



Ceratopora dichotoma Grahau r 



Chonetes lepidus Hall c 



Liorhynchus limitare (Varmxem) r 



Atrypa reticularis {Linne) c 



Ambocoelia umbonata {Conrad) cc 



Meristella barrisi Hall rr 



Lunulicardium fragile Hall r 



Styliolina fissurella {Hall) cc 



Orthoceras aegea Hall c 



Phacops rana {Green) cc 



G 5 inches. Bed F is followed by a dark gray earthy and 

 somewhat shaly limestone with few fossils except Styliolina 

 fissurella which is abundant. The following were found : 



Ceratopora dichotoma Grahau r 



Liorhynchus limitare {Yanuxem) c 



Styliolina fissurella {Hall) . cc 



H 18 inches. The upper exposed bed which forms the sub- 

 stratum beneath the soil, is a shaly dark bluish gray limestonp. 



