The Carboniferous Succession below the Coal-Measures. 453 



Posldoniella Imvis (Brown). Orthoceras n\}. 



Fosidonomi/a Becheri(BYonn). (Common.) Spirorbis b]). 



Fterinopecten cf. carbonarius, Hind. Ostracods. 



Rhynchonella sp. Fish-remains. 

 Glyphioceras reticulatum (Phill.). 



Mr. Kidston's paper may be referred to for an account of the 

 plants from this locality : it is interesting to note, however, that 

 this flora occurs in the Pendleside Series of Poolvash, Isle of Man, 

 Pendle Hill, and North StajBfordshire, associated as at Teilia with 

 a typical Pendleside fauna. 



We are indebted to Mr. T. W. D. Gregory for the following 

 analyses of samples of this limestone which were collected from 

 the quarries at Teilia and near Prestatyn : — 



Teilia. Near PrestatyH 

 Moisture 0-104 ... 0-53 



Analysis of Dried Sample. 



Carbon dioxide (C Oo) 38-68 ... 26-76 



Ferric oxide (F2 O3) ' 0-73 ... 0-71 



Aluminium oxide (AI2 O3) 1-27 ... 0-69 



Calcium oxide (CaO) 43-60 ... 32-57 



Magnesium oxide (Mg 0) 0-61 ... 0-51 



Soluble silica (Si O2) 0-11 ... 0-32 



Phosphorus pentoxide (Po O5) ... trace ... — 



*Insoluble residue ..." 14-91 ... 38-31 



* Analysis of insoluble residue. 



Or anic matter + combined water ... 2-92 ... 0-95 



Silica (Si O2) ' 10-26 ... 34-55 



Aluminium oxide (AI2 O3) 1-70 ... 2-48 



Ferric oxide (Fe2 O3) trace ... trace 



Some strata, possibly a little higher in the series, were examined 

 in a quarry on the high side of the road leading from Holywell to 

 Brynfoid (lat. 53° 16' 10" N., long. 3° 13' 10" W.). We found 

 similarly thin-bedded black limestones overlying finely laminated 

 black shales, and all dipping off the flanks of the mass of Car- 

 boniferous Limestone of Halkyn Mountain. In the black limestones 

 we found — 



Posidonomya Beeheri, Bronn. (Rather rare.) 

 Plant-remains. (Indeterminate, but not rare.) 



In stratigraphical sequence the next horizon is exposed near the 

 •entrance to Nant-figillt at Hendre, where a brickworks is established 

 for the manufacture of bricks, etc., from the soft laminated black 

 shales which are quarried there (lat. 53° 12' N., long. 3° 11' 10" W.). 

 Near tlie floor of the quari-y is a band of thin black limestone which 

 Ss very fossiliferous, and has yielded the following: — 



Lingula mytiloidcs, Sow. (In adjacent shales also.) 

 Fosidoniella Ice vis (Brown). 



F. minor (Brown). 



Fterinopecten papyraeeus (Sow.). (In shales also.) 

 Dimorphoceras Gilbcrfsoni (Phill.). 

 Glyphioceras cf. Fhillipsi, Foord & Crick. 



G. reticalattim (Phill.). 



