146 PKOCEEDINGS or THE GEOLOGICAL SOCIETY. [DcC. 20, 



3. D. ANTiQuius, spec, nov. PI. Y. figs. 1-3. 



"Wood-cells narrow, thick-walled, two to three rows of pores. 

 Medullary rajs of three or four series of cells with twenty or more 

 superimposed, nearly as wide as the wood- cells. Eings of growth 

 visible. This species would belong to the genus Pcdceoxylon of 

 Brongniart, and is closely allied to D. Withami, L. and H., which, 

 like it, occurs in the Lower Coal-measures. 



L. C, Horton (Dr. Harding). 



4. L. ANNULATUM, spec. nov. PI- y. figs. 10-13. 



Wood-cells with two or three rows of hexagonal disks. Medul- 

 lary rays of twenty or more rows of cells superimposed, in two 

 series. Wood divided into distinct concentric circles, alternating 

 with layers of structureless coal representing cellular tissue or very 

 dense wood. A stem 6 inches in diameter has fourteen to sixteen 

 of these rings, and a pyritized pith about 1 inch in diameter. This is 

 probably generically distinct from the preceding species. 



M. C, Joggins {Sir W.E. Logan-, J. W.D.). 



Akaucarites, linger. 

 Araucaeites gracilis, spec. nov. PI. YI. fig. 14. 



Branches slender, 0-2 inch in diameter, with ycaly, broad leaf- 

 bases. Branchlets pinnate, numerous, very slender, with small, 

 acute, spirally disposed leaves. 



U. C, Tatamagouche {J. W. D.). 



SiGiLLAEiA, Brongn. 



1. SiGiLLAEiA (Pavitlaeia) elegans, Brougn. PI. YII. fig. 26. 

 Abundant, especially in the roofs of coal-seams. S. heo'agona 



includes old trunks of this species. Young branches have scars of 

 an elliptical form like those of S. Serlii. 



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



2. S. (Eav.) tessellata, Brongn. 



M. C, Joggins and Pictou {J. W. D.); Sydney (R. Brown). 



.3. S. (Ehytidolepis) scutellata, Brongn. PI. YI. fig. 25. 

 M. and T. C, Joggins (Lyell; J. W.I).). 



4. S. (Eh.) Schlotheimian"A, Brongn. 

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



5. S. (Eh.) Satjllii, Brongn. 



M. C, Sydney (E. Broiun); Joggins (Lyell; J. W.B.). 



6. S. Beownii, Dawson (Quart. Journ. Geol. Soc. vol. x.). PI. YI. 



figs. 15-19. 

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



7. S. EENiFOEMis, Brongu. 



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



