Vol. 69.] THE PEMBROKESHIRE COALFIELD. 271 



being characteristic of that horizon ; twenty-four occur in, and one,, 

 namely, Calamites undulatus Sternb., is a doubtful determination 

 from, the Transition Coal Measures ; all occur in the Middle Coal 

 Measures, of which two : namely, Calamites schatzlarensis Stur and 

 SpJieaopteris sauveuri Crep., a.re characteristic of, and seven do not 

 occur below, that horizon ; while twenty-seven are found in the 

 Lower Coal Measures, fifteen of these being common to all the 

 divisions of the Coal Measures. 



Since all the species obtained from the Lower Coal Series occur in,. 

 and some are not found below, and others not above, the Middle 

 Coal Measures, this must be regarded as a typical Middle Coal- 

 Measure horizon. 



Settlings Beds. 



From the Settlings Beds I obtained Neuropteris tenuifolia 

 ( >chloth.), which I did not find in the Lower Coal Series farther 

 east, either along the Saundersfoot coast or in the central area 

 south-east of Haverfordwest. I also obtained -Neuropteris obliqua 

 (Brongn.) and N. scheuchzeri Hoffm., which were doubtfully recorded 

 from the eastern districts. 



The flora of th< 5 se beds, and especially the occurrence of 

 JST. scheuclizeri Hoffm., seems to indicate that they belong to a 

 fairly high Middle Coal-Measure horizon, probably higher than the 

 beds of the Lower Coal Series exposed along the Saundersfoot coast ;. 

 they may even belong to a higher horizon than the Timber Vein 

 group. 



Falling-Cliff Beds. 



From the Falling-Cliff Beds I obtained the following species- 

 which are not recorded from the Lower Coal Series of the eastern 



Odontopteris sp. 

 Pccopteris miltoni (Artis). 

 Pecoptcri* plumosa (Brongn.). 

 Corclaianthus pitcainiice (L. & H. 



Calamites undulatus Sternb. 

 Colamostachys (?) sp. 

 Annularia galioides (L. & H.). 

 Sphenophytlostachys sp. 

 Neuropteris tenuifolia (Schloth.). 



Besides these, Neuropteris obliqua ? (Brongn.) and LepidopJiyllum 

 lanceolatum L. & H. were obtained, which are doubtfully recorded 

 from the Lower Coal Series of the eastern districts, and also 

 Cordaites principalis (Germar), which was a somewhat uncertain 

 determination from the ' Millstone Grit ' of the Eastern Cleddau. 



This flora does not seem to supply any definite indication that 

 these beds belong to a higher horizon than those which occur 

 farther east. If, however, these beds lie immediately below 

 the Settling's Beds (as has been suggested by Prof. 0. T. Jones), and 

 if we rely on the evidence which the flora of these latter beds affords, 

 it seems possible that the Falling-Cliff Beds may also belong to a 

 higher horizon than those which occur farther east. 



