358 
Craig-y-beri, Llanarmonfach, Montgomeryshire. Upper 
Bala. 
Trinucleus Caractaci (Murch.) 
Orthis turgida (M°Coy). 
Craig-y-Glyn, N. of Rhaidr, near Llanarmonfach. Upper 
Bala. 
Isotelus tyrannus (Murch. Sp.) 
Orthis expansa (Sow.) 
— parva (Pand.) 
Strophomena compressa (Sow. Sp.) 
Cricor Mawr, E. of Llanelidan, Denbighshire. Upper 
Bala. 
Leptzena sericea (Sow.) 
Cwm bach, Builth. Wenlock shale. 
Graptolites Ludensis (Murch.) 
Orthoceras primeevum (Forb. Sp.) 
Cwm Craig Ddu, Builth, Brecknockshire. 
Group. 
Hemithyris nayicula (Sow. Sp.) 
— nucula (Sow. Sp.) 
Chonetes lata (V. Buch Sp.) 
Pterinea tenuistriata (M°Coy). 
Leptodomus amygdalinus (Sow. Sp.) 
Cardiola interrupta (Brod.) 
Cwm of the Cymmerig, East of Bala, Merionethshire 
(see Cymmerig). Upper Bala. 
Nebulipora lens (M'‘Coy). 
Beyrichia complicata (Salt.) 
Trinueleus Caractaci (Murch.) 
Tretaspis seticornis (His. Sp.) 
Orthis Actonize (Sow.) 
Orthoceras vagans (Salt.) 
Cwmlanerch Bettws (S. of), Caernarvonshire. 
Bala. 
Upper 
Trinucleus gibbifrons (M°Coy). 
Orthis elegantula (Dal.) 
— expansa (Sow.) 
— flabellulum (Sow.) 
— testudinaria (Dal.) 
Ludlow 
BRITISH PALALOZOIC FOSSILS. 
Cwmlanerch Bettws (continued). 
Leptzena sericea (Sow.) 
Bellerophon bilobatus (Sow.) 
Cwm yr Aethren, Hirnant valley, E. of Bala Lake. 
Orthis Hirnantensis (M°Coy). 
Cymmerig, E. of Bala, Merionethshire. Upper Bala. 
Phacops alifrons (Salt.) 
Hemithyris Wilsoni (Sow. Sp.) 
Orthis elegantula (Dal.) Var. a. 
— plicata (Sow. Sp.) 
— Vespertilio (Sow.) 
Leptzena deltoidea. 
— — Var. £. undata (M°Coy). 
— sericea (Sow.) 
Strophomena compressa (Sow. Sp.) 
Modiolopsis inflata (M°Coy). 
Trochus constrictus (M°Coy). 
Trocholites planorbiformis (Conrad). 
Cyrn y brain, Wrexham, Denbighshire. 
Stenopora fibrosa (Gold. Sp.) 
Petraia subduplicata (M°Coy). 
Ptilodictya explanata (M°Coy). 
Retepora Hisingeri (M°Coy). 
Spirifera biforata (Schlot. Sp.) 
— — Var. 8. dentata (Pand. Sp.) 
— percrassa (M°Coy). 
Pentamerus levis (Sow.) 
Orthis porcata (M°Coy). 
— testudinaria (Dal.) Var. a. 
Orthisina ascendens (Pand. Sp.) 
Leptzena deltoidea (M*Coy). 
— — Var. £. undata (M°Coy). 
— sericea (Sow.) 
Strophomena funiculata (M°Coy). 
— grandis (Sow. Sp.) 
‘Leptagonia depressa (Dal. Sp.) 
Pterinea pleuroptera (Conrad). 
Ambonychia striata (Sow. Sp.) 
Euomphalus triporcatus (M°Coy). 
Pleurotomaria turrita (Portk.) 
Upper Bala. 
Das Hithin Ridge, Hirnant, Montgomeryshire. Upper 
Bala. 
Orthis expansa (Sow.) 
— plicata (Sow. Sp.) 
— retrorsistria (M°Coy). 
