Vol. 59.] FOSSIL FLOKA OF THE CUMBERLAND COALFIELD. 19 



these Yorkshire beds, so far as I am aware; and I have been unable, 

 after many enquiries, to ascertain the existence of such remains in 

 any museum, with the exception of two specimens in the Wood- 

 wardian Museum at Cambridge. 1 Until such specimens have been 

 obtained (and there would seem to be no reason to doubt the 

 existence of a fossil flora), there is no evidence of a palaeobotanical 

 character on this point. 



B. The Productive Measures. 



Sedgwick 2 divided these Measures into an upper portion, including 

 the Main and Bannock Bands, and a lower, represented by four or 

 five workable but inferior coals. The opinions of Prof. Hull and 

 others, as to the horizons represented by these beds, have already 

 been quoted. 



(1) Upper Division, Productive Measures. 



The following plant-remains were obtained from the horizon of 

 the Main Band in various localities in the Cumberland Coalfield : — 



List of Plant-remains from the Upper Division of the 

 ' Productive Measures.' 



* Stigmaria ficoicles (Sternb.). 



Zeilleria delicatula (Sternb.). 

 * Sphenopteris obtusiloba, Brongt. 



Sphenopteris furcata, Brongt. 



Mariopteris muricata (Schl.). 



Mariopteris latifolia (Brongt.). 



Mariopteris sp. 



Neuropteris heterophylla, Brongt. 

 ^Neuropteris tenuifolia (Schl.). 



Neuropteris gigantea, Sternb. 



Alethopteris decurrens (Art.). 

 * Cordaites principalis (Germar). 



'* Catamites (Calamitina) varians, 



Sternb. 

 * Catamites ( Stylocalamites) Suckowi, 



Brongt. 

 ~* Catamites (Stylocalamites) Cisti, 



Brongt. ? 

 * Calamocladus equisetiformis (Schl.). 



Pinmdaria sp. 

 * Sphenophyllum cuneifolium (Sternb.). 

 Lepidodendron Wortheni, Lesq. 

 Lepidodendron lycopodioides, Sternb. 

 ^Sigillaria, Icevigata, Brongt. 

 Bothrode?idro}imi7mtifoliitm( 1 Bou.\a,y)? 



The conclusion drawn from this flora is that the horizon of the 

 Main Band is undoubtedly of Middle Coal -Measure age. The 

 remarks made in regard to the flora of the Lower Division of the 

 Sandstone Series apply equally here ; and the occurrence of Zeilleria 

 delicatula. a plant confined to the Middle Coal-Measures, places the 

 matter beyond doubt, so far as our present knowledge of the dis- 

 tribution of fossil-plants is concerned. The flora is also largely 

 identical with that above mentioned, nearly half the species being 

 common to the two. In the foregoing list, those species marked 

 with an asterisk (*) are represented in both floras. Pinally, the 

 occurrence of such plants as Lepidodendron Wortheni, Sigillaria 

 Icevigata, and JS J euroj)teris tenuifolia at once serves to distinguish 

 this from a Lower Coal-Measure flora. 



With, I think, only one exception, all the plants mentioned here 



1 These are a fine specimen of Sigillaria tessellata (Schl.) and a leaf of 

 Alethopteris lonchitica (Schl.), both recorded from Kotherham, but without 

 horizon. 



2 A. Sedgwick (36) p. 393. 



c2 



