606 MR. H. BOLTOX, F.R.s.E., ON [June, 1904. 



Pleuraccmthufi cylindricus (Davis). 



From tlie Middle Coal Measures of FuUedge Colliery, 

 Burnley. (L. 2175, e. coll. Kay-Shuttleworth, M.M.) 



From the Middle tloal Measures of Peel, Little Hulton. 

 (M.M.) No horizon known in either case. 



Pleuracanthiis undulatiis (Davis). 

 From the Californian or Thin Bed of FuUedge Colliery, 

 Burnley. (L. 1620, e. coll. Kay-Shuttle worth, M.M.) 

 Same locality and horizon, (e. coll. Wild, M.M.) 



Pleuraccmthus erect us (Davis). 

 From the Two Feet Mine of Bardsley. (W. 916, e. coll. 

 Wild, M.M.) 



Pleumcanthus serratus (Davis). 

 From the Middle Coal Measures, probably of Burnley. 

 No horizon stated. (L. 2323, e. coll. Kay-Shuttle worth, 



M.M.) 



Pleuracanthiis denticulatus (Davis). 



From the Two Feet Mine of Bardsley. (W. 913, e. coll. 

 Wild, M.M.) 



From the Californian or Thin Bed of FuUedge CoUiery, 

 Burnley. (W. 914, e. coU. Wild, M.M.) 



Plcuracantluis sp. indet. 



From the Nield Mine of Glodwick, Oldham (W. 1106, 

 e. coU. Wild, M.M.] 



In Shale, over the Californian or Thin Bed, FuUedge 

 Colliery, Burnley. (Greorge Wild, Trans. Manch. Geol. 

 Soc, Yol. lY., p. 185.) 



From the Two Feet Mine of Bardsley. (W. 912, e. coU. 

 Wild, M.M.) 



Ctenoptychius apicalis (Agassiz). 



From the Californian or Thin Bed of FuUedge Colliery, 

 Burnley. (W. 875, e. coll. Wild, M.M.) Associated with 

 Pleuroplax RankineL 



