LISTS OF THE LOWER PALAZOZOIC FOSSILS. 
Llanfechan (continued). 
Leptena sericea (Sow.) 
Murchisonia gyragonia (M*Coy). 
Llanfwrog, near Ruthin. Lower Ludlow or Wenlock 
shale. 
Beyrichia complicata (Schlot.) 
Ceratiocaris umbonata (Salt. Sp.) 
Orthis parva (Pander). 
Llanfyllin, Montgomeryshire. Upper Bala. 
Stenopora fibrosa (Gold. Sp.) 
Ptilodictya explanata (M°Coy). 
Glauconome disticha (Gold.) 
Hemithyris marginalis (Dal. Sp.) 
Orthis expansa (Sow.) 
— parva (Pander). 
— retrorsistria (M°Coy). 
Leptzena sericea (Sow.) 
Llangollen, Denbighshire. Lower Ludlow and Wen- 
lock shale. 
Spirifer crispus (Linn. Sp.) 
Hemithyris nucula (Sow. Sp.) 
Llangynyw Rectory, near Welchpool, Montgomery- 
shire. Wenlock shale. 
Graptolites Ludensis (Murch.) 
— — Var. minor (M°Coy). 
Fayosites alveolaris (Gold.) 
Portlockia Stokesii (M. Edwards Sp.) 
Calymene brevicapitata (Portk.) 
Spirifera insularis (EHichw. Sp.) 
Lepteena quinquecostata (M°Coy). 
Cardiola interrupta (Brod.) 
Arca Edmondiiformis (M°Coy). 
Orthoceras angulatum ( Wahl.) 
— subundulatum (Portk.) 
Llanrwst, Denbighshire. Caradoc group. 
Graptolites Ludensis (Murch.) 
Bellerophon subdecussatus (M*Coy). 
Llansaintfraid Glyn Ceiriog, S. of Llangollen. Upper 
Bala. 
Diplograpsus pristis (His. Sp.) 
Paleopora interstincta (Wahl. Sp.) 
— — Var. a. subtubulata (M°Coy). 
Llansaintfraid Glyn Ceiriog (continued). 
Favosites alveolaris (Gold.) 
Stenopora fibrosa (Gold. Sp.) 
— — Var. a. Lycopodites (Say). 
Halysites catenulatus (Linn. Sp.) 
Petraia zequisuleata (M°Coy). 
— subduplicata (M°Coy). 
— uniserialis (M°Coy). 
Ptilodictya acuta (Hall Sp.) 
— costellata (M°Coy). 
— explanata (M°Coy). 
— fucoides (M°Coy). 
Glauconome disticha (Gold.) 
Fenestella Milleri (Lonsd. Sp.) 
— subantiqua (d’Orb.) 
Tentaculites annulatus (Schlot.) 
Trinucleus Caractaci (Murch.) 
— gibbifrons (M°Coy). 
Chasmops Odini (Eich. Sp.) 
Orthis Actonize (Sow.) 
— calligramma (Dal.) 
— — Var. a. calliptycha (M°Coy). 
— elegantula (Dal.) Var. a. 
— expansa (Sow.) 
— flabellulum (Sow.) 
— parva (Pander). 
— plicata (Sow. Sp.) 
— poreata (M°Coy). 
Leptzena sericea (Sow.) 
— transversalis (Dal.) 
Strophomena antiquata (Sow. Sp.) 
Leptagonia depressa (Dal. Sp.) 
— ungula (M°Coy). 
Euomphalus lyratus (M°Coy). 
Llanwddyn in the (E. of) Berwyn Mountains. 
Bala. 
Trinucleus Caractaci (Murch.) 
Calymene Blumenbachi (Brong.) 
Isotelus Powisi (Murch.) 
Illzenus Davisi (Salt. ) 
Dysplanus centrotus (Dal. Sp.) 
Orthis flabellulum (Sow.) 
— retrorsistria (M°Coy). 
Strophomena grandis (Sow.) ¢ 
Bellerophon bilobatus (Sow.) 
365 
Upper 
