800 MR ROBERT KIDSTON ON THE FOSSIL PLANTS OF 



Cordaianthus, sp. 



Locality D. 



Oordaicarpus, Geinitz. 



Cordaicarpus Cordai, Geinitz, sp. 



(Plate I. figs. 12-13.) 



1855. Carpolithus Cordai, Geinitz, Vers. d. Steinlcf. in Sachsen, p. 41, pi. xxi. figs. 7-16. 



1876. Carpolithus Cordai, Boulay, Terr, houil. du nord de la France, p. 50, pi. i. fig. 4. 



1861. Cordaicarpon Cordai, Geinitz, Dyas., p. 150. 



1886. Cordaicarpus Cordai, Zeiller, Flore foss. bassin houil. d. Valen., p. 645, pi. xciv. fig. 13. 



1871. Cyclocarpus Cordai, Weiss, Foss. Flore d.Jiingst. Stk. u. Bothl., p. 207. 



1886. Cyclocarpus Cordai, Sterzel, Flora d. Rothl. im. nordio. Sachsen, p. 68 (? pi. ix. fig. 4). 



1899. Cyclocarpus Cordai, Hofmann and Ryba, Ltitpflanzen, p. 101, pi. xix. figs. 15-18. 



Description. — Seed smooth, lenticular in section, with a more or less circular contour, 

 very feebly apiculate at the summit, and sometimes slightly cordate at the base, gener- 

 ally surrounded by a narrow keel or border. They vary in size from 7 mm. to 20 mm. 



Remarks. — The narrow surrounding keel or border probably results from pressure, 

 and may represent the pericarp by which the harder nucule was surrounded. Only a 

 single specimen was met with at Canonbie, but the seed occurs at other localities in the 

 Middle Coal Measures of England. 



At Plate I. fig. 12 the seed is shown natural size, and at fig. 13 it is enlarged three 

 times. 



Locality C. 



Locality D. 



Carpolithes, Schlotheim. 



Carpolithes, sp. 



Artisia, Sternberg. 



Artisia, sp. 



Locality D. 



