CARBONIFEROUS LYCOPODS AND SPHENOPHYLLS. 43 



dence to believe that the latter should also be transferred from 

 Lepidodendron to Lepidophloios.^ 



There are many interesting points in the structure of 

 Lepidodendron which cannot be dealt with in this paper, and some 

 that are yet imperfectly understood. - 



1 In the large stem of Lepidophloios from Dalmenj-, recently described by 

 Seward and Hill in the Tntn.«. Boy. Soc. Edin., Vol. XXXIX., Part 

 IV., p. 907, 1900, there is a thick zone of secondary xylem. It seems very 

 probable that we have here a large specimen of Lepidodendron Harcourtii of 

 Witham, which is really a Lepidophloios, and that the stem later described 

 by Williamson, from the Yorkshire and Lanarkshire Coal Measures, as 

 Lepidodendron Harcourtii, Witham, is perhaps not Witham's plant. 



- The literature of the subject is very large, but the following works may 

 be specially mentioned in connection with the internal organization of 

 Lepidodendron : — 

 C. Eg. Bkrtrand, Remarques sur le Lepidodendron Harcourtii de Witham. 



Travaux et Memoirs des FacuUds de Lille, Vol. II., Mem. No. 6, Lille, 



1891. 

 BiNNEY, "Observations on the Structiure of Fossil Plants found in the 



Carboniferous Strata," Palaont. Soc.,Fa.TtU., " Lepidostrobus and 



some allied Cones," 1871. 

 BiNNEY, ibid.. Part III., Lepidodendron, 1872. 

 BiNNET, ibid.. Part IV., Sigillaria and Siigmaria, 1875. 

 Bower, " On the Structure of the Axis of Lepidostrobus Brownii, Schimper,'' 



Ann. ofBol., Vol. III., No. 27. 

 Hick and Cash, " The Structure and AfiRnities of Lepidodendron," Proc. 



Yorkshire Geol. and Polytechnic Soc., Vol. XL, Part II., p. 316, 1889. 

 HovELACQUE, " Recherches sur le Lepidodendron eelaginoides, Sternb." 



Mem. Soc. Linn de Normandie, Vol. XVIL, fasc. I., 1892, Caen. 

 Renault, Cours d. hotan. foss. Deux, annee (Vol. II.), 1882. 

 BENArLT, hudes d. (I'Ues Miniraux de la France, Bassin Hotdller et Permien 



d'Autun et d'Epinac, fasc. IV., "Flore Fossile," Deux Part, Text. 



1896. Atlas, 1893. 

 SoLMS-LAUBAcn, Fossil Botany, English Edition, Oxford, 1891. 

 ScHENK, Die Fossilen PJlanzen, 1888, Breslau. 

 Williamson, "On the Organization of the Fossil Plants of the Coal 



Measiires," Phil. Trans., Memoir II., 1872; Mem. IIL, 1872; Mem. 



X., 1880; Mem. XL, 1881; Mem. XII., 1881 ; Mem. XIV., 1889 ; 



Mem. XIX., 1893; "General Morphological and Histological 



Index, &c., 3Iem. and Proc. Manchester Lit. and Phil. 5oc., Part 



IL, Session 1892-1893. 1893. 

 Witham, The Internal Structure of Fossil Vegetables found in the Carboni- 

 ferous and Oolitic Deposits of Great Britain, 1883. 

 Witham, "On the Lepidodendron Harcourtii," Trans. Nat. Hist. Soc. 



Northumberland, Vol. II. , 1838. 



