Arber — The Flora of the Bally castle Coalfield. 167 



pinnules are simple above ; but lower down they divide into three wedge- 

 shaped segments. There is another specimen (t. 3974) in the collection from 

 the same locality, which belongs to this species. This is seen on Plate XI, 

 fig. 9, twice enlarged. The pinnules here are larger. The rounded apex is, 

 however, due to the fact that the tips of the pinnules have been broken off, 

 and are missing in this specimen. This fragment corresponds closely witli 

 that on plate xvi, fig. 4, of Stur's Culm Flora (see above). 



Remarks. — This species is very characteristic of the Lower Carboniferous 

 rocks. It is widely distributed, having been recorded from England 

 (Oementstoue Series of Northumberland) and Wales (Teilia Quarry, Flint- 

 shire). So far as I am aware it has not been previously recorded from Ireland. 

 As regards the vertical distribution, it is confined to the Lower Carboniferous, 

 and apparently it has hitherto only been recorded from the lower division. 

 On the Continent, it occurs in the Moravian-Silesian Daehschiefer of Austria. 



Figured Specimens. — t. 3965 and t. 3974 in the.^collection of the Geological 

 Survey of Ireland, Dublin. 



Sphenopteris, Brongniart. 



Sphenopteris flahellata, Baily {emend.). 



Plate X, fig. 3 ; Plate XI, figs. 5, 6, and 7. 



1888. Sphenopteris flalellata, . Baily {pars) Mem. Geol. Surv. Ireland, 



7-8, pp. 43, 47, fig. 9a and 9c [nan 9b) on 

 p. 47. 



Loeality. — " Rock face of cliff (Fair Head) about 400 feet above sea-level, 

 in yellow, ochreous sandstone," Ballycastle coalfield, Co. Antrim. (Baily, 

 ibid., p. 41). 



Diagnosis. — Frond pinnate or (?) bipinnate. Eachis fairly slender, 

 probably straight. Pinnules, simple above, becoming compound in the 

 lower portion of the pinna, markedly contracted at the base, entire. Simple 

 pinnules, cuneate or obovately cuneate, like those of Archaiopteris, rounded at 

 the apex. Nerves strong, close, radiating from the base, with several (five or 

 more) dichotomies. Larger pinnules more or less deeply divided into three, 

 five, or more rounded, broad lobes ; terminal lobe large, with a broadly 

 rounded apex, and with five or more pairs of dichotomous nerves, closely set. 

 Lateral pinnules unsymmetrically wedge-shaped, smaller than the terminal 

 pinnule, with two or more pairs of anastomosing nerves. 



Description of the Specimens. — On Plate XI, fig. 5, the original of the type 

 (t. 3964) figured by Baily on p. 47, fig. 9a, is refigured natural size. Two 



