28 ME. E. A. NEWELL AEBEE ON [Feb. I909, 



Pecoptebis, Brongniart, 1822. 



'Sur la Class, des Veget. Foss.' (Mem. Mus. Hist. Nat. vol. viii) p. 233. 



1. Pecopteeis miltoni (Artis). 



1825. Filicites Miltoni, Artis, ' Antediluvian Phytology ' pi. xiv. 



1835. Pecopteris abbreviata, Brongniart, ' Hist. Veget. Foss.' vol. i, p. 337 & 



pi. cxv, figs. 1-4. 

 1886-88. Pecopteris {Asterotheca) abbreviata, Zeiller, ' Flore Foss. Bass. Houill. 



Valenciennes ' p. 186 & pi. xxiv. 

 1887. Pecopteris Miltoni, Kidston, Trans. Roy. Soc. Edinburgh, vol. xxxiii, p. 374 



& text-figs. 2-5 a. 



Waldershare Series at 1761, ? 1764, 1863, ? 1864, 1866, 1868, 1871, 1873, 



? 1874, 1876, & 1897 feet. 

 Fredville Series at 1390 & 1391 feet. 



This fossil is very abundant in the "Waldershare Series. Host of 

 the specimens are of the ' abbreviata '-type, which Dr. Kidston 

 unites with P. Miltoni, as I think correctly. 



2. Pecopteeis abbobescens ? (Schloth.). 



1820. Filicites arborescens, Schlotheim, ' Petrefactenkuude ' p. 404. 



1833-34. Pecopteris arborescens, Brongniart, ' Hist. Veget. Foss.' vol. i, p. 310 



& pi. cii, figs. 1-2 ; also pi. ciii, figs. 2-3. 

 1890. Pecopteris (Asterotheca) arborescens, Zeiller, 'Bassin Houiller & Penmen 



d'Autun & d'Epinac ' fasc. ii, pt. i, p. 43 & pi. viii, fig. 1. 

 Wa Ider share Series at? 1903 feet. 



The occurrence of this species is doubtful. Only a single 

 specimen has been observed, which shows two fragments of 

 Pecopterid fronds, the one fertile and agreeing very well with the 

 fertile leaves of P. arborescens, and the other sterile. In the latter, 

 the nervation can just be made out, but not very clearly. The 

 lateral nerves, however, appear to be simple, and this would 

 suggest that the specimen may be provisionally referred to this 

 species. 



Maeiopteeis, Zeiller, 1879. 



Bull. Soc. Geol. France, ser. 3, vol. vii, p. 92. 



Maeiopteeis heeicata (Schloth.), var. neevosa (Brongn.). (PI. I, 

 fig. 6.) 



1828. Pecopteris nervosa, Brongniart, ' Hist. Veget. Foss.' vol. i, p. 297 & pi. xcv, 



figs. 1,1a, 15, 2,2 «. 

 1855. Alethopteris nervosa, Geinitz, ' Verstein. d. Steinkohlenf. in Sachsen ' p. 30 & 



pi. xxxiii, figs. 2-2 a. 

 1886-88. Mariopteris muricata, forme nervosa Zeiller, ' Flore Foss. Bass. Houill. 



Valenciennes ' p. 173 & pi. xx, fig. 1 ; pi. xxii, fig. 1 ; also pi. xxiii. 



Waldershare Series a,t 1825, 1830, 1833, 1838, 1872, & 1883 feet. 



These fragmentary specimens (PI. I, fig. 6) have very strong 

 nerves, like those figured by Brongniart (see above). The habit of 

 the frond, however, is more closely comparable with that of the 

 specimen figured by Prof. Zeiller, in his Valenciennes flora (pi. xxii, 

 fig. 2), which unites in some measure the characters of the two 

 varieties typica and nervosa. 



