26 //. Bossier — Gycadophyte from the Coal Measures. 



Pterophyllum, on the other hand, is well represented, with 

 P. oottoeanum G-utbier from the Lebacher Schichten (Middle 

 Efcothliegenden) at Reinsdorf near Zwickau, Saxony,* from the 

 lower Porplivrtnffe (Middle Rothlicgenden) at Bernsdorf near 

 Chemnitz, Saxonyf and from the Lower Permian (Middle- 

 Rothliegenden) at Zbeschau near Rossitz, Moravia,:}: P. hleck- 

 noides Sandberger, from the Middle Rothliegenden at Holzplatz 

 near Oppenau in the Black Forest of Baden,§ and from the 

 Middle Rothliegenden at Weissig near Pilnitz, Saxony ;|| P. 

 Faijoli Renault, from the Permo-Carboniferous at the Tranchee 

 de Pochin in the small coal basin of Montvicq a short distance 

 northeast of Commentry, France ;!" P. Grand Eiiryi Saporta 

 et Marion, from the 'upper zone' (Permo-Carboniferous) at the 

 mines of Montchanin and Montmaillot in the Blanzy Basin,' 

 France ;** P. Cambrayi Renault from the Upper Autunian 

 shales immediately overlying- the Boghead of Thelot in the Basin 

 of Autun ;ff P. inflexum Eichwald, from the indurated red 

 slate at Socolowa near Afonino in the coal basin of Kouznetzk 

 which lies in the central part of the province of Tomsk, on the 

 northern slope of the Altai Mts., Siberia,^ and from the red 

 slates in the valley of the Inia River in the same region§§— both 

 Permian II of what has been called the northern type — and 

 finally the unique occurrence of an unnamed species of Ptero- 

 phyllum from the Transition Coal Measures (W-estphalian) at 

 Barfreston in the Kent Coal-field of Great Britain reported in 

 1912 by Prof. E. A. E". Arber.^T which marks the earliest 

 occurrence thus far recorded of the plant group here con- 

 sidered. 



Geological Laboratory, 



Johns Hopkins University, 

 March 31, 1916. 



*Gutbier, 1849, Die Versteinerungen d. Eothlieg. in Sachs., p. 21, pi. vii, 

 fig. 7. 



f Sterzel, 1907, Mitth. d. grossherz. Bad. Geol. Landesanst. , Bd. v, p. 380. 



iHofrnann u. Ryba, 1899, Leitpflanzen, p. 103, pi. xx, fig. 3. 



§ Sandberger, 1864, Flor. d. ober Steinkohl. im bad. Schwarzwald, p. 34, 

 pi. ii, figs. 1-4. 



|| Geinitz, E., 1873, Brandschiefer von Weissig, p. 701, pi. iii, fig. 9, 

 including P. cottceanus E. Geiuitz (non Gutbier), p. 701, (excl. syn.) pi. iii, 

 fig- 8. 



IT Renault, 1890, loc. cit., p. 619, pi. lxviii, fig. 1. 



**Zeiller, 1906, loc. cit., p. 194, pi. xlvii, fig. 1. 



t+ Renault, 1896, loc. cit., p. 322, text fig. 64. 



XX Eichwald, 1860, Lethaea Rossica, vol. i, p. 215, pi. xv, figs. 5, 6. 



§§ Geinitz, 1871, in Cotta's Der Altai, p. 172, pi. iii, fig. 7. 



Ill Zeiller, 1902, Nouv. observ. sur la flore foss. d. bass, de Kousnetzk ; 

 Compt. rend., t. cxxxiv, p. 887. 



lK[ Arber, 1912, Geol. Mag., Dec. v, vol. ix, p. 98, pi. v, figs. 2, 4. 



