410 MR ROBERT KIDSTON ON THE FOSSIL PLANTS IN THE 



Remarks. — I have previously placed Dactylotheca dentata, Brongt., sp., with this fern 

 as a variety of it, and this view may be correct ; but it must be noted that Dactylotheca 

 plumosa, Artis, sp., is the only form I have hitherto met with in the Middle Coal 

 Measures, where it would appear Dactylotheca dentata is either absent or very rare. 



It is perhaps better to leave the relationship of Dactylotheca dentata and Dactylotheca 

 plumosa to each other an open question till the subject has been more fully investigated.* 



Alethopteris, Sternberg. 

 Alethopteris lonchitica, Schloth., sp. 



Pecopteris lonchitica, Brongt., Hist. d. veget. foss., p. 275, pi. lxxxiv. figs. 1-7; pi. cxxviii. 

 Alethopteris lonchitica, Zeiller, Flore foss. d. bassin houill. d. Valenciennes, p. 225, pi. xxxi. 

 Filicites lonchiticus, Schloth., Flora d. Vorwelt, p. 55, pi. xi. fig. 22. 



Alethopteris lonchitica, Schloth., sp., var. decurrens, Artis, sp. 



Alethopteris decurrens, Zeiller, Flore foss. d. bassin houill. d. Valenciennes, p. 221, pi, xxxiv. figs. 2, 3 ; 



pi. xxxv. fig. lj pi. xxxvi. figs. 3, 4. 

 Filicites decurrens, Artis, Antedil. Phyt., pi. xxi. 



Pecopteris Mantelli, Brongt., Hist. d. veget. foss., p. 278, pi. ixxxiii. figs. 3, 4. 

 Pecopteris Mantelli, Lindley & Hutton, vol. ii. pi. cxlv. 

 Pecopteris heterophylla, Lindley & Hutton, Foss. Flora, vol. i. pi. xxxviii. 



Remarks. — Zeiller treats Filicites decurrens, Artis, as a distinct species, but I am 

 much more inclined to regard it as a variety of Alethopteris lonchitica, Schloth., sp. 



Alethopteris Serlii, Brongt. 



Pecopteris Serlii, Brongt., Hist. d. veget. foss., p. 292, pi. Ixxxv. 



Rhacophyllum, Schimper. 

 Rhacophyllum crispum, Gutbier, sp., forma lineare, Gutbier, sp. 



Fucoides crispus, Gutbier, Vers. d. Zwick. Schwarzk., p. 13, pi. i. fig. 11 ; pi. vi. fig. 18. 



Rhacophyllum Lactuca, Schimper, Traite d. paleont. veget., vol. i. p. 684; pi. xlvi. fig. 1 ; pi. xlvii. fig. 1 



(fig. 2 1) ; vol. iii. p. 524. 

 Fucoides linearis, Gutbier, Vers. d. Zwick. Schwarzk., p. 13, pi. i. figs. 10, 12. 



Remarks. — The specimens agree with the Fucoides linearis, Gutbier, which is most 

 probably only a variety of Fucoides crispus, Gutbier. 



The fossil figured by Mr Marrat as " Rootstock of a Fern " t is a fragment of 

 RJiacophyllum, and what has been mistaken for " palese or chaffy scales " are stainings in 

 the matrix, and not an organic substance. 



Megaphyton, Artis. 

 Megaphyton frondosum, Artis. 



Megaphyton frondosum, Artis, Antedil. Phyt., pi. xx. 



* Since this was written, I believe I have evidence to show that " dentata " is most probably only a variety of 

 Filicites plumosa, Artis.— April 1889. t Proc. Liverpool Geol. Soc, Session 13, 1871-72, pi. i. fig. 2, 1872. 



