APPENDIX. 135 



The type of his genus is the Lepidodendron cyclostigma, 

 Lesqx., 1 of which additional specimens have come into the 

 possession of the United States Natural History Museum. 

 These later examples, along with the specimens originally 

 described by Lesquereux, form the subject of Mr. White's memoir. 

 Although several of his specimens show the epidermis, none of 

 them seem to have clearly shown the structure of the scar left by 

 the fallen organ. 



I believe that the plant described by Mr. White under the 

 name of Omphalophloios cyclostigma. Lesqx. sp., is the Lepidoden- 

 dron anglicum, Sternb.. 2 from Paulton, Somerset. 3 I have 

 several good examples of the Somerset plant from the same beds 

 as those from which the type specimen was derived, and have 

 figured portions of some of these in my paper on " The Fossil 

 Flora of the Radstock Series of the Somerset and Bristol Coal 

 Field." 4 



Brongniart, in his Prodrome, 5 places Lepidodendron anglicum 

 in Stigmaria under the name of Stigmaria reticulata, and in my 

 paper, to which reference has already been made, it is also placed 

 in Stigmaria, but under the name of Stigmaria anglica, Sternb. 

 sp. A comparison of the figures given in the Trans. Roy. Soc. 

 Edin., Vol. XXXIIL, Plate XXVIIL, with those published by 

 Mr. David White, will, I think, show the identity of the 

 American examples with Sternberg's plant, especially if my fig. 9 

 be compared with Mr. White's fig. 3, PI. XXI. 



Omphalophloios anglicus, Sternb. sp., I believe to be a rhizome 

 comparable to Stigmaria, with which it appears to be closely 

 related. The imperfect preservation of the American specimens 

 has, I am afraid, obscured the structure of the scars. 



Different portions of a specimen from Somerset (No. 426), 

 measuring about 9 J inches long, are shown at fig. 26, a, b, c, d, 

 and e. Between the smaller scars at the upper end and those at 

 the basal end of the fossil are certain differences which merit 



1 Coal Flora, II., p. 394, PL LXIL, fig. 5. 18S0. 



2 Vers. I., fasc. i\\, p. xi., PI. XXIX., fig. 4. 1826. 



3 From the Radstock Series of the Upper Coal Measures. 



* Trans. Boy. Soc. Edin., Vol. XXXIIL, Part II., p. 401, PI. XXVIIL, 

 figs. 9. 9a, 10, 10a, \0h. 

 5 page 87. 1828. 



