4G8 R. HAEKNE3S AND H. A. NICHOLSON ON THE STRATA BETWEEN 



Brachiopoda. 



1. Sbrophomena corragatclla, Dav. Keisley. 



2. — rhomhoidulis, Wilckens. Keisley. 



3. deltoidea, Conrad. Keisley. 



4. expansa, Sow. Keisley. 



5. Orthis biforata, Scbloth. Keisley. 

 6. calligramma, Dalm. Keisley. 



7. Jlabcllulum, Sow. Keisley. 



8. Actonia, Sow. Keisley. 



9. vespertilio, Sow. Keisley. 



10. porcata, M'Coy. Keisley. 



11. elegantula, Dalm. Skelgill Beck. 



12. Piscina ? cornigata?, M'Coy. Keisley. 



13. Triplegia ? monilifera, M'Coy. Keisley. 



14. Atrypa imbricata, Sow. Keisley. 



Jo. Leptcena tenuicincta, M'Coy. Keisley. 



Cephalopoda. 

 1. Orthoceras vagans, Salt. Keisley. Abundant, 



Crustacea. 



1. Spkesrexochus minis, Beyrich. Keisley. 



2. Cheirurus juvenis, Salt. Keisley. 



3. bimucronatus, Murch. Keisley. 



4. gelasinosus, Portl. Keisley. 



5. cancrurus, Salt. Keisley. 



6. octolobatus, M'Coy. Keisley. 



7. Lichas laxatus, M'Coy. Keisley. 



8. hibernicus, Portl. Millom. 



9. Illceniis Davisii, Salt. Keisley. 



10. Bowmanni, Salt. Keisley. 



11. JRosenbergi, Eichwald. Appletreeworth Beck. 



12. Cdlymene Blumenbachii, Brongn. Keisley. Bare. 



13. Agnostus, sp. A form somewhat resembling A. trinodus, Salt. ( = Tri- 



nodus agnostiformis, M'Coy), in shape and size, but having its whole 

 surface tuberculated. Not uncommon at Keisley. 



14. Phacojys (Chasmops) macrourus, Sjogren. This characteristic Bala species 



is the Odonfochile obhisieaudata of M'Coy ; but it wants tbe surface- 

 granules of the true P. obtusicaudatus, Salt. Fine tails, though some- 

 what distorted by cleavage, are not uncommon at Appletreeworth 

 Beck. 



15. Phacops apiculafus, Salt. Appletreeworth Beck. 



16. Ampyx Sarsti, Portl. Keisley. 



17. Remopleurides, sp. Alai-ge form allied to, but apparently distinct from, 



R. longicapitatus, Portl. Not uncommon at Keisley. 



18. Proetus, sp. The free cheeks only are known, and resemble P. latif?'ons, 



M'Coy. Keisley. 



19. Bronteus, sp. Pygidia only known. Keisley. 



20. Beyrichia im/pendens, Jones. Appletreeworth Beck. 



21. Primitia protenta, Jones. Appletreeworth Beck. 



No one can analyze the preceding list of fossils and entertain any 

 doubt as to the geological horizon of the Coniston Limestone. 

 "Whether or not it be in the precise position of the Bala Limestone 

 of Wales is a point which may admit of doubt ; but it is the precise 

 equivalent of the limestone of the Lower Silurian of Portraine, 

 co. Dublin, and also of that of the Chair of Kildare (see Appendix), 



