THE CARBONIFEROUS ROCKS OF CANONBIE, DUMFRIESSHIRE, ETC. 751 



from all the scars, and in this condition they show a central oval ring. On the scar 

 figured in the earlier description # the ring shows a small notch at the summit, but as 

 this is not a constant character, its occurrence may have been accidental. 



On Plate I. of the present communication several small figures are given, which 

 illustrate more fully the structure of this plant. Fig. 4 shows a small fragment of the 

 cortex, natural size ; at fig. 5 one of the scars is given, enlarged about two times, which 

 shows the lateral angles and the small notch at the apex, immediately below which is 

 a small circular point ; this is better seen at the further enlarged fig. 6. Fig. 7 

 gives an outline sketch of a young stem, natural size, and one of the scars is enlarged 

 at fig. 8. The lateral angles and notch are not observable here, but the scars are only 

 1 mm. long. On the specimen shown at fig. 4 the scars are 5 mm. long. The stems 

 show no trace of aerial rootlets. 



I think Eshdalia is probably a fern stem, but on this point I do not speak with any 

 certainty. 



Locality. — Glencartholm ; and Kershope Burn, Liddesdale. 



Equisetacese. 



Asterocalamites, Schimper. 



Asterocalamites scrobiculatus, Schlotheim, sp. 



1820. Calamites scrobiculatus, Schlotheim, Petrefactenkunde, p. 402, pi. xx. fig. 4. 



1826. Bomia serobiculata, Sternb., Essaifore monde prim., vol i. fasc. 4, p. xxviii. 



1843. Bomia serobiculata, Roemer, Vers. d. Harzgebirges, p. 1, pi. i. fig. 4. 



1852. Bomia serobiculata, Gbpp., Foss. Flora d. Ubergangs, p. 131, pi. x. figs. 1-2. 



1854. Bomia serobiculata, Rbmer, Palxont., vol. iii. p. 45, pi. vii. fig. 5. 



1869. Bomia serobiculata, Ludwig, Palseont., vol. xvii. p. 116, pi. xxi. figs. 1, la, 2, 2a. 



1880. Asterocalamites scrobiculatus, Zeiller, Veget. foss. da terr. liouil., p. 17, pi. clix. fig. 2. 



1899. Asterocalamites scrobiculatus, Zeiller, Flore foss. du bassin liouil. d'Heraclee, p. 58, pi. v. fig. 1. 



1899. Asterocalamites scrobiculatus, Potonie, Lehrb. d. Pflanzenpal., p. 184, fig. 178. 



1900. Asterocalamites scrobiculatus, Zeiller, Elements de paleobot., p. 159, fig. 112. 



1901. Asterocalamites scrobiculatus, Vaffier, Etude geol. et paleont. du Carbonifere inferieur du 



Maconnais, p. 125, pi. viii. figs. 1, la, 16, le, Id. 

 1901. Asterocalamites scrobiculatus, Potonk', Silur- und die Culm-Flora cles Harzes u. des 

 Magdeburg ischen, p. 86, figs. 46-51. 



1898. Arclneocalamites scrobiculatus, Seward, Fossil Plants, p. 386, rig. 103, p. 385. 

 1828. Calamites radiatus, Brongt., Prodrome, p. 37. 



1828. Calamites radiatus, Brongt., Hist. d. veget. foss., p. 122, pi. xxvi. figs. 1-2. 



1880. Calamites radiatus, Rothpletz, Flora u. Fauna d. Culmform. bei Haiuiclien in Sachsen, — Botan. 



Centralblatt, p. 4, pi. i. figs. 1-5. 

 1833. Equisetites radiatus, Sternb., Essai, fore monde prim., vol. ii. fasc. 5-6, p. 46. 

 1862. Calamites [Asterocalamites) radiatus, Schimper, Le terr. de Transition d. Vosges, p. 321, pi. i. 



1899. Calamites {Asterocalamites) radiatux, Hofmann and Ryba, Leitpflanzen, p. 23, pi. i. figs. 3-4. 

 1869. Bomia radiata, Schimper, Traite d. paleont. veget., vol. i. p. 335, pi. xxiv. figs. 1-9 (non fig. 10). 



* Trans. Roy. Soc. Edin., vol. xxx., pi. xxxi. fig. la. 



