1 68 Seientific Proceedings, Royal Dublin Society. 



fragments of pinnse are seen. That on the right shows two broadly ovate, 

 undivided pinnules, with a trilobed pinnule above. In the case of the frag- 

 ment on the left, a somewhat narrow, undivided pinnule is seen above, and 

 below are three compound pinnules, sliowing very clearly the transition from 

 the undivided to the deeply trilobed state. On the back of the same specimen 

 there is a much better preserved fragment, which is figured on Plate XI, fig. 6, 

 twice enlarged. The pinnules here are similar to those last described ; but the 

 undivided pinnule is much broader. This specimen shows the nervation very 

 clearly. Fig. 9c of Baily's description may possibly be a reversed drawing of 

 a part of this specimen. On another specimen (t. 3962) a less satisfactory frag- 

 ment of the same plant is shown, which is reproduced on Plate XI, fig. 7. 

 Here the pinnule is divided into five lobes. In the case of the specimen 

 (t. 3963) seen on Plate X, fig. 3, the trilobed pinnules appear to be widely 

 separated. 



Remarks. — After a careful search through the scattered literature on the 

 Lower Carboniferous flora, I have not been able to identify Baily's specimens 

 with any species known to me from the Lower Carboniferous rocks. The 

 unsymmetrical, simple pinnules recall those of some members of Archceo^^teris. 

 The Irish plant, however, differs entirely from that genus, with perhaps 

 very few exceptions, such as A. li/ra, Stur, in possessing compound pinnules. 

 Apparently only a simple specimen is known of that frond from Austria, and 

 this appears to be quite distinct. S^ihenopteris foUata, Stur, bears a somewhat 

 closer resemblance to the Ballycastle species, but differences here again 

 preclude the inclusion of the latter in Stur's species. 



Type. — t. 3964 in the Collection of the Geological Survey of Ireland in 

 the National Museum, Dublin. 



Lepidodendron, Sternberg. 

 1. Lepidodendron Veltheimi, Sternb. 

 PI. X, fig. 2 ; PI. XI, fig. 10 ; PI. XII, figs. 11, 13, and 15. 



1826. Lepidodendron Veltheimi, . Sternberg, Vers. Darstell. Flora 



Vorwelt, vol. i., pt. iv., p. 43, 



pi. lii, fig. 3. 

 1833. Lepidodendron Veltheimianum, Sternberg, Ibid., vol. ii., pts. v.-vi., 



p. xii. 

 1833. Lepidodendron ornatissinium, , Sternberg, Ibid., vol. ii., pts. v.-vi., 



p. xii. 

 1837. Lepidodendron ornatissimum, Brongniart, Hist. Veget. foss., vol. ii., 



p. 70, pi. xviii. 



