374 Proceedings of the Royal Physical Society. 



PI. cxlix. SiGiLLARiA MuRCHisoNi, L. and H. 



Locality. — "Knowlsbury Coal Field." 



Ecmarhs. — The type specimen appears to be lost, but 

 judging from the ligure, the fossil was evidently in too 

 imperfect a condition for the creation of a species, as all 

 critical characters seem to have been effaced. 



PI. cl. Otoptepjs (?) DUBiA, L. and H. 



Locality. — " Sandstone of the Knowlsbury Coal Field." 



Remarks. — This is a Bhacopteris, and must be enrolled as 

 PtHACOPTERis DUBIA, L. and H. sp. 



The rachis is very thin, — not thick as might be supposed 

 from the figure. The apparent thick rachis of the figure 

 results from a fracture of the stone — the pinnules on the 

 right being on a higher level than those on the left. The 

 thin dark line on the right of the left-hand row of pinnules, 

 towards the base, shows the tliickness of the rachis. The 

 pinnules are placed in two vertical series, not spirally as 

 thought possible by Lindley and Hutton. 



The type is iu the collection of the Geological Society of 

 London.-^ 



PL cli. Sphenopteris macilenta, L. and H. 



Locality. — Eisca, Monmouthshire. 

 Horizon. — Coal-Measures. 



PL cliL Lepidophyllum trinerve, L. and H. 



Locality. — Blackwoodia, Monmouthshire. 



Horizon. — Coal-Measures. 



Remarks. — This species is to be referred to Lepidophyllum 

 MAJUS, Brongt. The supposed occurrence of three nerves in 

 this species is most probably an error of observation.^ 



PL cliii. Pecopteris loxchitica. 



Locality. — (?) 



Remarks. — Now placed in the genus Alethopteris. 



^ My thanks are due to the Societ}" for the loan of this specimen. 

 2 See ante, p. 359. 



