580 MR ROBERT KIDSTON ON 



Calamitina undulata, Sternb., sp. 



Calamitina undulata, Kidston, Trans. York. Nat. Union, part 18, p. 100, 1893. 



Catamites undulatus, Sternb., Ess. flore monde prim, i., fasc. 4, p. xxvi ; ii., fasc. 5-6, p. 47, pi. i. fig. 2, 

 (1 pi. xx. fig. 8). 

 *Calamites undulatus, Kidston, Trans. Roy. Soc. Edin., vol. xxxvii. p. 315. 



Remarks. — Mons. Zeiller has already suggested that Calamites undulatus, Sternb., 

 might perhaps belong to Weiss' genus Calamitina, and specimens received from Mr 

 Hemingway, from the Yorkshire Coal Field, have confirmed this opinion, both in their 

 possessing a periodic occurrence of branch scars and in their outer bark being smooth. 



Middle Coal Measures (White Ash Series). 



Locality. — Tynybedw, Ystrad-Rhondda. 



Horizon. — 9 Feet Seam. 

 Locality. — Ebbw Vale. 



Horizon. — Darren Pins Ground (under 9 Feet Seam). 



Group II.— E ucalamites, Weiss. 

 Calamites ramosus, Artis. 



Catamites ramosus, Artis, Antedil. Phyt., pi. ii. 

 *Calamites ramosus, Kidston, Trans. Roy. Soe. Edin., vol. xxxvii. p. 313. 



Middle Coal Measures (White Ash Series). 



Locality. — Bwllfa Dare Colliery, Aberdare (Annularia radiata, Bgt). 

 Horizon. — 4 Foot Seam. 



Group III. — Stylo calamites, Weiss. 

 Calamites Suckowii, Brongt. 



Calamites Suckowii, Brongt., Hist. d. veget.foss., p. 124, pi. xv. (1 pi. xiv.) fig. 6. 

 *Calamites Suckoicii, Kidston, Trans. Roy. Soc. Edin., vol. xxxvii. p. 314. 

 Calamites Suckoicii, Renault, Flore foss. terr. houil. de Comentry, part ii., 1889, p. 385, pi. xliii. figs. 1-3, 

 pi. xliv. figs. 4-5. 



Middle Coal Measures (White Ash Series). 



Locality. — Bwllfa Dare Colliery, Aberdare. 



Horizon. — 4 Foot Seam. 

 Locality. — Abcraman Colliery, Aberdare. 



Horizon. — 7 Foot Seam. 



