TEILIA QUARRY, GWAENYSGOR, NEAR PRESTATYN. 421 



As its fruit — 



Pothocites Grantoni, Paterson, Trans. Bot. Soc. Edin., vol. i. p. 45, pi. iii., 1841. 



Fruit of Bornia radiata (Pothocites Grantoni), Kidston, Ann. Mag. Nat. Hist, 1883, vol. xi. p. 297, pis. 

 ix., x., xi. figs. 9, 10 ; pi. xii. figs. 13-17. 



Remarks. — Not infrequent. Several specimens have been collected. 



Adiantides, Schimper. 



(Adiantites, Auct.) 



Adiantides antiquus, Ett., sp. (Plate I. fig. l.) 



Adiantides antiquus, Stur., Culm Flora, Heft i. p. 66, pi. xvi. figs. 4-6 ; pi. xvii. figs 3, 4. 

 Adiantum antiquum, Ettingshausen, Foss. Flora d. mahr.-schles. Dachschiefers, p. 22, fig. 7, plate. PL vii. 

 fig. 1 (in Denks. d. Kaiser. AJcad. Wiss, vol. xxv. p. 98, pi. vii. fig. 1). 



Description. — Frond tripinnate or decompound, pinnae alternate ; (?) secondary pinnae 

 lanceolate ; tertiary pinnae, on lower secondary pinnae, lanceolate, on upper secondary 

 pinnae broadly lanceolate, or composed of from 2-4 radiating pinnules. Pinnules 

 cuneate, apex slightly rounded or truncate, entire or split into two or more cuneate 

 segments. Veins numerous, dichotomous, and radiating from the contracted base of 

 the pinnule, which forms a short foot-stock. 



Remarks. — On the lower and larger tertiary pinnae the pinnules are alternate, but 

 the upper tertiary pinnae are mostly reduced to single pinnules, or to 2-4 pinnules, which 

 are often arranged in fan-shaped groups, the component pinnules of which spring from 

 a common point or have a much shortened rachis. The bipinnate condition of the 

 secondary pinnae is therefore lost towards the apex of the primary pinnae. 



The fronds of Adiantides antiquus must have attained to considerable size. The 

 specimen figured shows what are probably the remains of two primary pinnae, neither of 

 which is perfect, the more imperfect being only represented by a small fragment on the 

 lower left-hand corner of the figure. 



The nervation is very feebly indicated in the Teilia specimen, and that only in a few 

 of the pinnules. From other specimens the nervation is shown to be very fine, the 

 numerous dichotomous veins radiating from the base of the pinnule. The main rachis 

 of a specimen figured by Stue # is nearly -^ inch wide, — this indicates the large size 

 attained by the fronds of this species. Adiantides antiquus is rare in Britain. 



* Loc. cit., pi. xvii. fig. 3. 



