LISTS OF THE LOWER 
Mynydd Fron Frys, five miles W. of Chirk, Denbigh- | 
shire. Upper Bala. | 
Ptilodictya explanata (M°Coy). 
Retepora Hisingeri (M'Coy). | 
Glauconome disticha (Gold.) | 
Lingula longissima (Pander). | 
Turbo crebristria (M*Coy). 
Trocholites anguiformis (Sow. Sp.) 
Mynydd-y-Gaer, Llanefydd, near Ruthin, Denbighshire. | 
Lower Ludlow. 
Spirigerina reticularis (Linn. Sp.) 
Hemithyris navicula (Sow. Sp.) 
— nucula (Sow. Sp.) 
Orthis elegantula (Dal.) 
Leptzena levigata (Sow.) 
Cardiola interrupta (Brod.) 
Nant Gwrhwyd Uchaf, S. of Llangollen. Wenlock shale. 
Actinocrinus pulcher (Salt.) 
Nant Morfydd, N. of Llangollen. Wenlock shale. 
Graptolites Ludensis (Murch.) 
Nant y arian, Llandeilo. Upper Bala. 
Isotelus tyrannus (Murch. Sp ) 
Orthis expansa (Sow.) 
— parva (Pander). 
Nant y Brain, W. of Wrexham. Upper Bala. 
Calymene brevicapitata (Portk.) 
Nant y groes, S. of Bala, N. Wales. 
Lingula alternata (Sow.) 
— Davisi (M°Coy). | 
Upper Bala. 
Nantyr in Glyn Ceiriog, S. of Llangollen. Upper Bala. 
Graptolites Ludensis (Murch.) 
Old Radnor, Radnorshire. Woolhope limestone. 
Favosites Gothlandica (Linn. Sp.) 
Stenopora fibrosa (Gold. Sp.) 
Strephodes pseudo-ceratites (M'Coy). 
Hemithyris crispata (Sow. Sp.) 
Leptena Ouralensis (M_ V. K.)} 
Trochus czelatulus (M'Coy). 
[Fase. 11] 
PALAZOZOIC FOSSILS. 369 
Parklane, Llandeilo, Caermarthenshire. Ludlow Group. 
Odontochile caudata (Brong. Sp.) 
Orbiculoidea implicata (Sow. Sp ) 
Spirigerina reticularis (Linn. Sp.) 
Hemithyris nucula (Sow. Sp.) 
Pentamerus galeatus (Dal. Sp.) 
Orthis lunata (Sow.) 
Strophomena funiculata (M°Coy). 
Leptagonia depressa (Dal. Sp.) 
Pterinea pleuroptera (Conrad). 
— tenuistriata (M‘Coy). 
Ambonychia striata (Sow. Sp.) - 
Modiolopsis Nilsoni (His. Sp.) 
Cardiola fibrosa (Sow.) 
Conularia cancellata (Sandberger.) 
Pen Cerrig, Builth, Radnorshire. Upper Balu. 
Diplograpsus mucronatus (Hall Sp.) 
— pristis (His. Sp.) 
Diplorhina triplicata (Hawle and Corda). 
Trinucleus latus (Portk.) 
Tretaspis fimbriata (Murch. Sp.) 
Ampyx nudus (Murch. Sp.) 
Ogygia Buchi (Brong. Sp.) 
— radians (M‘Coy). 
Isotelus Powisi (Murch.) 
Siphonotreta micula (M*Coy). 
Orthis elegantula (Dal) Var. a. 
— retrorsistria (M°Coy). 
— Vespertilio (Sow.) 
Leptzena sericea (Sow.) 
Modiolopsis inflata (M°Coy). 
Peniarth Meifod, Montgomeryshire. Upper Bala. 
Graptolites Ludensis (Murch.) 
Petraia rugosa (Phill, Sp.) 
Spirifera biforata. 
— — Var. D. fissicostata (M*Coy). 
Leptzena sericea (Sow.) 
Penlan, Llandovery, S. Wales. Upper Bala. 
Petraia rugosa (Phill. Sp.) 
— uniserialis (M°Coy). 
Pentamerus levis (Sow.) 
— undatus (Sow. Sp.) 
Orthis parva (Pander). 
— plicata (Sow. Sp.) 
3B 
