Daviesiella Ilangollensis in Derbyshire. 465 



that the lower parts of the Lligwy Sandstone may belong to that 

 zone.^ This lies at the base of the series and contains blocks of 

 derived limestone, which, however, do not contain any zonal fossils. 



In addition to Greenly's records, there is the specimen originally 

 figured by Davidson as found on the beach at Beaumaris by Henry 

 Ormerod.^ 



In the North- Western Province, D. Ilangollensis has been met 

 with by Professor Garwood in the neighbourhood of Kirkby 

 Stephen. In his paper on " The Lower Carboniferous Succession 

 in the North- West of England ",^ he gives a description of the 

 D. Ilangollensis Band (h 9), and says : " This interesting band is 

 confined to the southern end of theShap andRavenstonedale districts, 

 where it appears to lie a little above the base of the Lower 

 Dihuno2'>hyllum Sub-zone, as shown by its position relative to the 

 Bryozoa Band and by its association with Productus cf. maximus. 

 No specimens of Dibimophyllum have, however, been found 

 associated with it. D. Ilangollensis would seem, therefore, to have 

 entered the North- Western Province slightly later than it appeared 

 in North Wales, as its horizon in the latter region is usually 

 assigned to S, of the South- Western Province." On a later page 

 (p. 504) Professor Garwood points out that the D. Ilangollensis 

 Band occurs only at one place in the North- West Province. It is 

 found in impure shaly limestone, east of Kirkby Stephen railway 

 station (Midland), between the station and Wharton Hall, associated 

 with Productus cf. maximus. Above the band are cherty limestones, 

 somewhat barren of fossils, and neither Cyathojjhyllum ynurchisoni 

 nor Dihinophgllum occur. It may be pointed out that in this neigh- 

 bourhood the beds differ both lithologically and palseontologically 

 from the normal development of the Lower Dihunoplujllwn Sub- 

 zone elsewhere, being more argillaceous than in the Shap area. 



On the Continent D. Ilangollensis is now known from several 

 places. 



In the Avesnes region of North-East France, the species enters 

 in the upper part of the Horizon S (of Vaughan), which includes the 

 suhlaevis Oolite with Cyathophyllum (f) and the overlying Daviesiella 

 Beds (" Productus giganteus " Beds).* Details of its occurrence 

 here are given by Dr. A. Carpentier ^ and by Professor G. Delepine,'' 

 who give the level as between the Productus suhlaevis limestones 

 and the Productus cora oolite. 



1 Greenly, ibid., p. 616. 



" Davidson, op. cit., 1854, pi. 8, fiiz. 6 [L9835, Manchester Museum]. 



3 Q.J.G.S., vol. Ixviii, 1912, p. 478. 



^ Vaughan, " Correlation of Dinantian and Avonian," Q.J.G.S., vol. Ixxi, 

 1915, p. 18. 



^ Carpentier, " Contribution a I'Etude du Carbonifere du Nord de la France," 

 3Iem. Soc. G4ol. du Nord, vol. vii, 1913, pp. 85, etc. 



^ Delepine, " Description du gisement a Daviesiella Ilangollensis de 

 Florennes," Annates de la Soc. Scient. de Bruxelles, Session 27th November, 

 1919, third section (p. 4 reprint). 



VOL. LIX. — NO. X. 30 



