THE CARBONIFEROUS ROCKS OF CANONBIE, DUMFRIESSHIRE, ETC. 775 



and Odontopteris Reichiana, Gutbier, with which he finds them associated.* M. Zeiller, 

 on the other hand, would refer Cyclopteris trichomanoides exclusively to Odontopteris 

 minor, Brongt., as Odontopteris Reichiana, Gutbier, does not occur in the beds in 

 which he finds the Cyclopteris.^ 



In Britain, O. minor, Brongt., has not yet been discovered, and 0. Reichiana, 

 Gutbier, is very rare, whereas Cyclopteris trichomanoides is very common, and almost 

 invariably in the beds in which Neuropteris heterophylla, Brongt., occurs, and to 

 which species I believe the British specimens of Cyclopteris trichomanoides should 

 without doubt be referred. To the localities to which I refer, and in which the C. 

 trichomanoides is especially abundant, the genus Odontopteris does not occur. The 

 excellent specimen of Neuropteris heterophylla figured by Roehl under the name of 

 Neuropteris Loshii shows the cyclopteroid pinnules in position on the rachis. j 



The true explanation of this difference of opinion may perhaps be, that several 

 species bore rachial cyclopteroid pinnules, which, when removed from the parent frond, 

 cannot be specifically distinguished. 



Cyclopteris trichomanoides, Brongt., and Cyclopteris obliqua, Brongt., are both shown 

 on the specimen figured by Roehl, the oblique form of C. obliqua arising from its 

 position and mode of insertion on the rachis. 



Locality. — Blinkbonny Pit, Rowanburn. 

 Horizon.- — Roof of Main Coal. 



Locality. — Engine Pit, Rowanburn. 



Horizon. — Shales associated with Five-foot Coal. 



Neuropteris gigantea, Sternberg. 



1823. Osmnnda gigantea, Sternb., Essai ftore monde prim., vol. i. fasc. 2, pp. 32, 37, pi. xxii. 



1826. Neuropteris gigantea, Sternb., Essai flore monde prim., vol. i. fasc. iv. p. xvi. 



1830. Neuropteris gigantea, Brongt., Hist. d. vSgit. foss., p. 210, pi. lxix. 



1832. Neuropteris gigantea, L. and H., Fossil Flora, vol. i. pi. In. 



1848. Neuropteris gigantea, Sauveur, Veget. foss. d. ten. houil. Belgique, pi. xxxiii. fig. 1 (uon pi. xxxi. 



figs. 3-4. 

 1886. Neuropteris gigantea, Zeiller, Flore Foss. bassin houil. d. Valen., p. 258, pi. xlii. fig. 1. 

 1892. Neuropteris gigantea, Potonie, Ueber einiga Carbonfame, iii. Theil, p. 22, text, figs. 1-4, pi. ii. 



figs. 1-2, pi. iii. figs. 1-4, pi. iv. figs. 1-2. (Jahrb. d. k. preuss. geol. Landesanstalt for 1891.) 

 1899. Neuropteris gigantea, Potonie, Lehrb. d. Pf/anzenpal., p. 113, fig. 101, p. 118, fig. 105, p. 153, 



fig. 150. 

 1899. Neuropteris gigantea, Hofmann and Ryba (pars), Leitpflanzen, p. 64, pi. ix. figs. 4, ia-M (non 



pi. viii. fig. 14, pi. ix. fig. 3). 



1899. Neuropteris gigantea, Zeiller, Flore foss. d. bassinhouil. d. Heraclee, p. 44, pi. iv. fig. 10. 



1900. Neuropteris gigantea, Zeiller, Elements d. paleobot., p. 105, fig. 79. 



1901. Neuropteris gigantea, Kidston, Proc. Yorks. Geol. and Polytech. Soc., vol. xiv. pp. 193, 211, 213, 



pi. xxviii. fig. 3, pi. xxix. fig. 4. 



* Flore Carbon d. Depart, d. I. Loire et d. Centre d. I. France, p. 113. 



t Flore foss. terr. houil. d. Commentry, p. 266. 



% Roehl, Foss. Flora d. Steink.-Form. Westph., pi. xvii. 



