LEPIDOPHLOIOS, AND ON THE BRITISH SPECIES OF THE GENUS. 533 



the extremities of the branches belong to the former, and the base or main stem to the 

 latter." 



I give this long extract, as I shall have occasion to refer again to this specimen, which 

 has more recently been refigured by Professor Williamson.* 



1848. Halonia, Hooker. " On the Vegetation of the Carboniferous Period, as compared 

 with that of the Present Day," Mem. Geol. Survey of Great Britain, vol. ii. part ii. 

 p. 423. 



Sir J. D. Hooker merely gives the opinion expressed by Mr Dawes, who was 

 " inclined to regard the species of Halonia as roots of Lepidodendron, on which opinion I 

 have no remarks to offer." 



1849. Lepidophloios, Brongniart. "Tableau des genres de veget. foss., p. 43. (In 

 Dictionnaire universel d'histoire naturelle, vol. xiii.) 

 Brongniart unites Lomatophloios, Corda, and Pachyphlceus, Goppert, with Lepido- 

 phloios, and, while accepting Corda's description of the internal structure of Lomato- 

 phloios crassicaule, he states his opinion that the STENBERGiAN-like axis described by 

 Corda as the pith-cast of Lomatophloios, was not a true Sternbergia ( = Artisia, Sternb.). 

 Halonia is here treated by Brongniart as a distinct genus. 



1852. Halonia, Goppert. Foss. Flora d. Ubergangsgebirges, p. 192. 



This author considers Halonia an autonomous genus, and describes several species, 

 founding his specific characters on the scars and the position of the knots, especially in 

 the number of the series they form on the branches, t 



1854. Ettingshausen. Steinkf. von Radnitz, p. 57. 



Ettingshausen treats Lomatophloios as a distinct genus, and regards the occurrence 

 of Sternbergia as sufficient evidence on which to record the genus Lomatophloios. 



1854. Geinitz. Flora d. Hainichen-Ebersdorfer u. d. Floehaer Kohlenbassins, 



pp. 47, 48. 



In speaking of Lepidophloios laricinus, Geinitz says " that we can no longer doubt 

 that Lepidophloyos is a true Lepidodendron ; " and he further states that the leaf-scar 

 is placed at the top of the cushion and not at the lower end, as supposed by Sternberg. 

 This appears to be an error, as far as Lepidophloios laricinus is concerned. 



1855. Cyclocladia, Goldenberg. Flora Sarcepontanafoss., Lief. i. p. 18. 



This genus is synonymous with Halonia, L. and H. Goldenberg's Cyclocladia 

 must not be mistaken with the Cyclocladia, L. and H. (1834), Fossil Flora, vol. ii. pi. 

 cxxx., which is a Calamitina. 



* Phil. Trans., part ii. pi. xxxiv., 1883. 



t The Lepidodendron sexangulare, Gopp., loc. cit., p. 171, pi. xliii. fig. 4, is a Lepidophloios. 



