.part 2] 



ITS STEUCTUEE AND EOCK-SFCCESSIOIS', 



171 



AsaphuS'potuisi & Seterorthis-alternata Fauna. 



Glyn-Gower Sandstones and 

 Allt-Ddu Mudstones. 



C=ver3- common; c= common; i-=rare. 



Ortliis ( Set er or this) alternata (Sowerhy) 



var. retrorsistria (Davidson) 



OrtJiis (s.s.) callifframma Dalraan 



Orthis (JJalmanella) elegantula (Dalraan) vai*. ... 



Orthis (Dinortliis) flahelhduvi Sowerby 



Orthis (Plectorth is) plicata (Sowerby) 



Orthis (Pl(esiomys) porcata (Sowerby) 



Orthis (Dalmanella) testndinaria (Dalman) 



Orthis (HarTcnessella) vespertilio (Sowerby) 



Plectambonites sericea (Sowerby) 



Plectambonites transversalis (Dalman) 



Triplecia (Cliftonia) spiriferoides (M.'Coy) 



Lepfeena rhomboidalis Wilckens 



Strophomena (Pajinesquina) expansa (Sowerby) 

 Strophomena (Pajinesquina) grandis {^owexhy) ... . 



Lingula ovata Sowerby 



Asaphns powisi Salter 



Calymene caractaci Salter 



Ca lymene hrevicapitata Portlock 



Calymene planimarginata Reed 



JEncrinurus muUisegmentatus (Portlock) 



Trinucleus concentricus type 



Soma lonotus bisulcattis (Salter) 



Tetradella complicata (M'Coy) 



MonticuUpora lens (M'Coy) 



Monti cidipor a fibrosa (M'Coy) 



Olyptocrinus basalts M'Coy 



Opliiurids 



JBellerophon (Sinuites) bilobatus (Sowerby) 



Cyclonema crebristria (M'Coy) 



Lophospira gyrogonia (M'Coy) 

 Murchisonia cf. simplex (M'Coy) 



Bala. 



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Shropshire. 



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