S20 



localities on the lines of the sections above noticed. It is a mere 

 synopsis of the fossil evidence, but has been carefully made out by 

 Mr. J. Sowerby ; and by Mr. J. W. Salter, who accompanied the 

 author in his last examination of the country along the line of the 

 Holyhead road. 



List of Fossils from several localities in the 

 Cambrian Slates. 



Spirifer crucialis (new). 



Orthis actonise (do). 



vespertilio (do). 



— — virgata (abundant). 



— — canalis. 



Radiata. 



Favosites polynnorpha. 



Round coral. 



Hemispherical coral 

 (new ?), and several 

 other species of corals 

 and shells. 



V. 



Sandstone bed on Cader 

 Dinmael {scarcely ex- 

 amined). 



Crustacea. 



Brachiopoda. 

 Orthis flabellulum (abun- 

 dant). 

 — — canalis. 



CONCHIFERA. 



Avicula, n.s. 

 VI. 

 Bala Limestone. 



Crustacea. 

 Tails of a Calymene. 

 Brachiopoda. 

 Leptsena tenuistriata (none 



of sericea). 

 Spirifer crucialis. 

 Orthis actonise (do.). 



vespertilio (do.). 



canalis. 



virgata (abundant). 



Radiata. 

 Round coral. 

 Hemispherical coral. 

 Tentaculites annulatus. 



I. 



Penmachno and Conway 



Falls. 

 Trinucleus caractaci. 

 Asaphus tyrannus. 

 Leptsena sericea. 

 Orthis canalis. 



testudinaria. 



— — alternata. 



actonise. 



Tentaculites scalaris. 



II. 



Hills opposite Bettws-y- 

 coed. 



Crustacea. 

 Trinucleus caractaci. 

 Heteropoda. 

 Bellerophon bilobatus. 



Brachiopoda. 

 Leptsena sericea. 

 Orthis canalis. 



testudinaria. 



alternata. 



acton iae. 



flabellulum. 



new (very convex), 



(half a mile above Con- 

 way Falls). 



III. 



Cerrig y Druidion. 

 Orthis alternata. 



new (abundant) 



Ophiura salteri. 



IV. 



Glyn Diffviys and Cader 

 Dinmael Limestone. 



Crustacea 

 Tails of a Calymene. 

 Asaphus powisii. 

 — - tyrannus. 

 Trinucleus caractaci. 

 Brachiopoda. 

 Leptsena tenuistriata. 

 . sericea (abundant). 



VIL 



Calcareous Slates of Bala, 

 Gelli Grin, Sfc. 



Crustacea. 

 Trinucleus caractaci. 



middle division of the 



Brachiopoda. 

 Leptsena tenuistriata. 



sericea (very large). 



Spirifer radiatus, M. C. 



crucialis ? 



Orthis flabellulum. 



vespertilio. 



canalis. 



alternata. 



virgata. 



Mollusca. - 

 Turbo pryceae. 



■ angulatus ? 



Euomphalus sculptus ? 



Radiata. 

 Ophiura salteri (pelvis) 



VIIL 



Slates. South of Llansaint- 

 fraid Glyn Ceiriog. 

 Crustacea. 

 Trinucleus caractaci. 

 Calymene (tail). 

 Asaphus caudatus ? 



powisii. 



Brachiopoda. 

 Leptsena tenuistriata. 



sericea. 



Orthis inflata (new). 



canalis. 



alternata. 



actonise. 



Radiata. 

 Tiirbinolopsis bina 

 (abundant). 



IX. 



Llansai7itfraidLimestones 



and Shales. 

 Leptsena sericea. 

 Orthis canalis. 



actoniffi. 



Euomphalus (new). 



Radiata. 

 Catenipora escharoides 

 (abundant), and many 

 others. 



