272 APPENDIX TO THE 



Shropshire. — Ter. sacculus, Athgris expansa, A. globularis, A. plano-sulcata, Spirifera 

 duplicicosta, S. glabra, S. ovalis, Sp. pinguis, Cgrtina carbonaria, Bh. acuminata, 

 Camarophoria globulina, Strophomena analoga, Ort/tis resupinata, Prod. Cora, 

 P. Kegserlingiana, P. punctatus, P. sulcatus, P. spinulosus, P. sinuatus, P. undatus, 

 C. papilionacea, P. LlangoIIensis, and an undetermined Lingula ; so that instead 

 of nineteen species (recorded at page 244), as many as forty species will have 

 been discovered up to the present time in Shropshire. 



Denbighshire. — Athgris ghbularis, A. expansa, A. plano-sulcata, Sp. octoplicata, Sp. 

 pinguis, Bh. pugnus, Cam. globulina, Prod, aculealus, P. fmbriatus, P. Kegserlin- 

 giana, P. latissimus, P. margaritaceus, P. scabriculus, P. sinuatus, P. Youngianus, 

 and Ch. papilionacea, have to be added to the twenty-four species recorded in our 

 table, so that here also we have about the same number of species as we find 

 recorded for Shropshire. 



Fossiliferous localities in the North Wales belt of Carboniferous Limestone, counties 

 Shropshire and Denbighshire, beginning at the southern termination, and proceeding 

 north and west.- — The Limestone consists of three principal divisions, viz., " Lower beds," 

 a series of pale-coloured beds, separated by thin shales, and interstratified with several 

 layers of red marl ; " Middle beds," of gray crystalline Limestone ; and " Upper beds," 

 alternations of layers sometimes similar to the middle bed, and presenting a less splintering 

 structure, and suitable for various architectural purposes. This list has been communicated 

 to me by Mr. D. C. Davies, of Oswestry. 



Localities, north-west Shropshire. Characteristic Fossils and General Observations. 1 



Llnnymynech, 6 miles S. of Oswestry Lower beds: Prod. LlangoIIensis, Ter. hastatu, Prod. 



Cora. 



Porthywaen, A\ miles S.W. of Oswestry Lower beds: P. LlangoIIensis, T. hastata, T. sac- 



culus, Cyrtina carbonaria, &c. Upper beds : P. 

 giganteus, P. latissimus, Spi? , ifers, &c. 



Treflacb, 3 miles W. of Oswestry Orthis Micheleni, Sp. octoplicata, and nearly all tbe 



fossils peculiar to the upper beds ; but the quar- 

 ries, Avhich are not much worked, have been 

 diligently searched. 



Pentregaer, 4 miles N.W. of Oswestry Chonetes papilionacea, C. Hardrensis, Spiriferinas, 



and the smaller Prodncta. 



Lawnt and Craig-y-rhiw, 3v miles N.W. of Oswestry Chonetes Hardrensis, Prod, spinulosus, and P. 



longispinus. 



Selattyn Hills, W. of Lawnt, and N.N.W. of Strept. crenistria, Prod. Jimbriatus, P. latissimus, 

 Oswestry P. giganteus, Orthis Michelini, Athyris plano- 



sidcata, &c. 



Bronygarth, 2 miles W. of Chirk Ordinary fossils. 



1 The foregoing remarks are confined to remains of Brachiopoda. Other fostils are found at most of 

 the places mentioned. 



