158 PROCEEDINGS OE THE GEOLOGICAL SOCIETr, [DeC. 20, 



petiole. It occurs in an erect position in a sandstone on "Wallace 

 Eiver. 



M.. C, Sydney (E. Brown) ; U. C, Pictou (J. W. D.) ; Wallace 

 Eiver (J)r. Creed). 



2. P. ABBREviATA, Brongn. 



M. C, Sydney (B. Brown); Salmon Eiver, U. C, Pictou (J. W. D.). 

 Yery common both, in the Upper and Middle Coal-formations. 



3. P. RIGID A, spec. nov. 



Similar to P. arhorescens, but much smaller, and with finer nerves. 

 r. C, Pictou {J. W. D.). 



4. P. TjJiriTA, Brongn. 



Certain pinnules of a frond are sometimes swollen as if covered 

 with fructification below ; and in this state they resemble P. arguta, 

 Brongn. The sori are seen in other specimens, and are large, round, 

 and covered with an indusium as in Asjpidium. 



M. C, Sydney {B. Brown) ; U. C, Pictou {J. W. J).). 



5. P. PLtTMOSA, Brongn. 

 M.C.jSjdnej (B. Brown). 



6. P. POLYMORPHA, BrOUgU. 



M, C, Sydney (B. Brown). 



7. P. ACUTA, Brongn. 

 M.C., Pictou (J: W.B.). 



8. P. LONGIFOLIA, BrOUgU. 



In Bimhury^s list, from Sydney. 



9. P. T^NioPTEROiDES, Bunbupy. 

 M. C, Sydney {B. Brown). 



10. P. CTATHEA, Brongn, 

 M. C, Sydney {B. Brown). 



11. P. ^QUALis, Brongn. 

 M. C, Sydney {B. Brown). 



12. P, SiLLiMANi ?, Brongn. 

 In LyelVs list, from Sydney, 



13. P. viLLOSA, Brongn. 



M. C, Pictou {LyelVs list). 



14. P. BucKLANDi, Brongn. 

 M. C, Sydney {Brown's list). 



15. P. OREOPTEROiDES, Brongu. 

 M. C, Sjdjiej {Brown's list). 



