1865.] DAWSON COAL-rOEMATION. 147 



8. S. LAEVIGATA, Brongn. 



M. C, Sydney (B. Brown); Joggins (J. W. D.). 



9. S. PLANicosTA, spec. nov. PI. YI. fig. 21. 



Scars half hexagonal above, rounded below ; lateral vascular im- 

 pressions elongate; central small, punctiform. Ribs 1-1 inch broad, 

 smooth externally, longitudinally striated on the ligneous surface. 

 Slight transverse wrinkles between the scars, which are distant from 

 each other about an inch. Allied to S, Icevigata, but with very thin 

 bark. 



M. C, Sydney (E. Brown). 



10. S. CATENOiDES, spec. uov. PI. YI. fig. 22. 



Cortical surface unknown; ligneous surface with puncto-striate 

 ribs I'l inch in breadth, and with single oval scars half an inch long, 

 and an inch distant from centre to centre. A very large tree. 

 Perhaps, if its cortical surface were known, it might prove to be a 

 large Syringodendron. 



M. C, Joggins (J. Smith) ; Sydney (B. Brown). 



11. S. STEiATA, spec. nov. PI. YI. fig. 23. 



Eibs prominent, coarsely striate, 0-35 inch wide. Scars nearly 

 as wide as the ribs, rounded, hexagonal, 1 inch distant ; lateral vas- 

 cular marks narrow, central large. On the ligneous surface scars 

 single, round, oblong ; bark very thin. 



M. C, Joggins (J. W. D.). 



12. S. ? 



A small erect stem, somewhat like S.Jlexuosa. 

 M. C, Joggins (J. W. D.). 



13. S. (Clathraeia) Menardi, Brongn. 



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



14. S.[(AsoLANus) Sydnensis, spec. nov. PI. YII. fig. 28. 



Ribs obsolete; cortical and ligneous surfaces striate; vascular 

 scars two, elongate longitudinally, and alike on cortical and ligneous 

 surfaces ; scars 1-1 inch distant, in rows 0-6 inch distant. Stigmarian 

 roots, same with variety h of Stigmaria, as described below. 



M. C, Sydney {B. Broivn). 



15. S. ORGANUM, L. & H. 



M. C, Sydney (B. Brown). 



16. S. ELONGATA, Brongn. 



M. C, Sydney (B. Brown). 



17. S. i-LEXTJOSA, L. & H. 



M. C, Sydney (B. Broiun's list in 'Acadian Geology'). 



18. S. PACHYDERMA, L. & H. 



M. C, Sydney (B. Brown's list). 



