MARCELLUS LIMESTONES AND THEIR FAUNAS 133 



Bryozoans 



Hederella canadensis Nicholson 

 H. cirrhosa Hall 

 Reptaria stolonifera Rolle 



Bldstoids 

 Nucleocrinus lucina Hall 



Corals 

 Favositet^ placenta Hall 

 Stereolasma rectum Hall 

 Striatopora limbata Conrad 

 Bomingeria 

 Aulopora 



2 Fauna of lower beds at Lancaster (Miss Wood's i-vi) 



Worms 

 Spirorbis 



Crustaceans 

 Cryphaeus bootlii Green 

 Phacops rana Green 

 Cyphaspis craspedota Hall 

 Primitiopsis punctulifera Hall 



CephalopOds 

 Orthoiceras exile Hall 

 O. marcellense Vanuxem 

 Bactrites 



Gastropods 



Platyceras attenuatum Hall • 

 Pleurotomaria capillaria var. rustica Hall 

 Onychochilus nitidulus Clarke (?) 

 Loxonema 



LamelUhranchs 



Pterinopecten exfoliatue Hall 

 Actinopteria muricata Hall 

 Cyprieardinia indenta Conrad 



