402 MR ROBERT KIDSTON ON THE FOSSIL FLORA OF THE 



Camerton, and portions of some of these are represented on Plate XXVIII. figs. 

 9, 9c/, 10, 10rt, 10b. The appearance of the species varies considerably with age. 

 Fig. 10 shows the youngest condition of the plant with which I have met ; 

 tig. 10a is from the same specimen, but a little further up the root. Figs. 9 

 and 9a show parts of another example ; these illustrate portions of the same 

 specimen slightly separated laterally, but at the same height on the root. In 

 many cases the lateral lines of the rhomboidal meshes are much more con- 

 spicuous than the upper and lower oblique boundary lines ; in other cases the 

 two oblique lines are so feebly indicated that the fossil assumes the appearance 

 of a ribbed Sigillarian. This condition is slightly indicated in fig. 9a. 



At fig. 10b a single enlarged scar is given to show the true Stigmarian 

 nature of the vascular cicatrice. 



This fossil attained considerable size. The largest roots that show their 

 complete width measure 5^ inches across, but some of the broken fragments 

 are evidently parts of larger specimens. One of these large specimens, 

 belonging to Mr George West, Camerton, shows a bifurcation of the root into 

 two almost equal forks. 



Localities : — Paulton (type) ; Radstock ; Camerton. 



Cordaites, Unger, Genera et species Plantarum Fossilium, p. 277, 1850. 

 Cordaites angulosostriatus, Grand' Eury. 



Cordaites angulosostriatus, Grand' Eury, Flore carbon, du Depart, de la Loire, p. 218, pi. xix. 

 Cordaites angulosostriatus, Zeiller, Veget. foss. du terr. houil., p. 144, pi. clxxv. figs. 2, 3. 

 Cordaites angulosostriatus, Renault, Cours. d. botan. foss., 1881, p. 90, pi. xii. fig. 3. 



Remarks. — This species is generally distributed throughout the whole of 

 the Radstock Series, and in some localities is very plentiful. 

 Localities : — Radstock ; Upper Conygre Pit ; Camerton. 



Poacordaites, Grand' Eury, Flore carbonifer du Depart, de la Loire, 



p. 222, 1877. 



Poacordaites microstachys, Goldenberg, sp. 



Poacordaites microstachys, Zeiller, Veget. foss. du terr. houil., p. 146, pi. clxxv. fig. 1. 



Cordaites microstachys, Goldenberg, in Weiss, Foss. Flora d. jiingst. Stic. u. d. liothl., p. 194 (wood- 

 cut figs. 1-3, p. 195). 



Poacordaites linearis, Grand' Eury, Flore Carbon, du Depart, de la Loire, p. 225, pis. xxiii. and 

 xxiv. figs. 1-3. 



Remarks. — Very rare. 



Localities : — Radstock ; Braysdown Colliery. 



