LISTS OF THE LOWER PALOZOIC FOSSILS. 
Gelli Grin Bala (continued). 
Hemithyris marginalis (Dal. Sp.) 
Orthis Actoniz (Sow.) 
— elegantula (Dal.) Var. a. 
— expansa (Sow.) 
— flabellulum (Sow.) 
— parva (Pander). 
— plicata (Sow. Sp.) 
— Vespertilio (Sow.) 
Leptena deltoidea. 
— — Var. p. undata (M°Coy). 
— sericea (Sow.) 
— — Var. rhombiea (M°Coy). 
Strophomena grandis (Sow. Sp.) 
— Spiriferoides (M*Coy). 
Leptagonia depressa (Dal. Sp.) Var. 
Modiolopsis antiqua (Sow. Sp.) 
Turbo crebristria (M°Coy). 
Girvan, Ayrshire. Bala Group. 
Paleeopora favosa (M*Coy). 
Stenopora fibrosa (Gold. Sp.) 
Ptilodictya costellata (M°Coy). 
Leptzena quinquecostata (M*Coy). 
Glenquhaple, Ayrshire. Bala Group. 
Leptzena quinquecostata (M°Coy). 
Murchisonia simplex (M°Coy). 
Orthoceras politum (M°Coy). 
Glyn Ceiriog, S. of Llangollen, Denbighshire. Upper 
Bala. 
Ptilodictya explanata (M*Coy). 
Trinucleus gibbifrons (M*Coy). 
Portlockia apiculata (Salt.) 
Chasmops Odini (Eichw. Sp.) 
Goldengrove, Llandeilo, Wenlock shale and Upper Bala. 
Stenopora fibrosa (Gold. Sp.) 
Trinucleus gibbifrons (M°Coy). 
Calymene Baylei (Barr.) 
Isotelus tyrannus (Murch. Sp.) 
Spirifera trapezoidalis (Dal.) 
Orthis calligramma (Dal.) 
— turgida (M°Coy). 
Lepteena corrugata (Portk. Sp ) 
Strophomena simulans (M‘Coy). 
Euomphalus triporcatus (M°Coy). 
[easc. 11.] 
361 
Goleugoed, Mandinam, Llandovery, Caermarthenshire. 
Upper Bala. 
Palzopora petalliformis (Lonsd. Sp.) 
— tubulata (Lonsd. Sp.) 
Favosites alveolaris (Gold.) 
— Gothlandica (Linn. Sp.) 
Stenopora fibrosa (Gold. Sp.) 
Halysites catenulatus (Linn. Sp.) 
Ceraurus Williamsi (M*Coy). 
Hemithyris marginalis (Dal. Sp.) 
Pentamerus oblongus (Sow.) 
— undatus (Sow. Sp.) 
Orthis parva (Pander). 
— protensa (Sow.) 
Leptzena quinquecostata (M*Coy). 
— sericea (Sow.) 
Greiston on the Tweed, near Inverleithen. Bala Group. 
Graptolites Ludensis (Murch.) 
— Sedewicki (Portk.) 
— tenuis (Portk.) 
Myrianites tenuis (M*Coy). 
Gwyddelwern, Derwen, near Corwen, Denbighshire. 
Caradoc sandstone. 
Graptolites Ludensis (Murch.) 
Leptzena levigata (Sow.) 
— minima (Sow.) 
Nuculites post-striatus (Emmons). 
Hafod Evan Penmachno, Caernarvonshire. 
Bala. 
Upper 
Orthis retrorsistria (M°Coy). 
Haykin Gill, Cumberland. Skiddaw slate. 
Graptolites sagittarius (Linn. Sp.) 
Helms Gill, Dent, Yorkshire. 
limestone.) 
Orthis crispa (M°Coy). 
Upper Bala (Coniston 
Helms Knot, Dent. Upper Bala (Coniston flag.) 
Graptolites Ludensis (Murch.) 
Stenopora fibrosa (Gold. Sp.) 
Cardiola interrupta (Brod.) 
Orthoceras sub-undulatum (Portk.) 
Cycloceras sub-annulatum (Munst. Sp.) 
3A 
