434 FLORA OF THE CARBONIFEROUS PERIOD. 



Branches slender, 0-2 inch in diameter, with scaly, broad 

 leaf bases. Branchlets pinnate, numerous, very slender, wit 

 small acute, spirally disposed leaves. 



Sigillaria, Brongt. 



Under this name I include four sub-genera, viz., (1). Favu- 

 laria of Sternberg, of which S. elegans is the type ; (2). Rhyti- 

 dolepis of Sternberg, of which S. scutellata is the type; (3). 

 Sigillaria proper, of which S. reniformis is the type ; (4.) Cla- 

 thraria, Brongt, of which S. Menardi is the type. 



To these may perhaps be added Asolanus of Wood (Proc. Phila. 

 Ac. Sci.), though most of the specimens of Sigillaria destitute of 

 ribs are only portions of old trunks of the ribbed species. With 

 these sub-genera I would place Syringodendron and Calamoden- 

 dron as members of the gymnospermous family Sigillariacece. 

 Stigmaria may be retained as a provisional genus, to include 

 roots not connected with the trunks. 



1. Sigillaria (Favularia) elegans, Brongt. 



M. C, Joggins, J. W. D. ; Sydney, R. Brown : abundant, espe- 

 cially in the roofs of coal seams. S. Hexagona includes old trunks 

 of this species. Young branches have scars of an elliptical form 

 like those of S. Serlii. 



2. S. {Fav.) tessellata, Brongt. 



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



3. S. (Rhytidolepis) Scutellata, Brongt. 

 M. and U. C, Joggins, Lyell, J. W. D. 



4. S. (JKh.) Schlotheimiana, Brongt. 

 M. C. Joggins, Lyell, J. W. D. 



5. S. (Rh.) Saullii 1 ~Bvongt. 



M. C. Sydney, R. Brown ; Joggins, Lyell, J. W. D. 



6. S. Brownii, Dawson (Jl. Geol. Socy., vol. X.) 

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



1. S. reniformis, Brongt. 



M. C. Joggins, Lyell, J. W. D., Sydney, R. Brown . 



8. S. levigata, Brongt. 



M. C. Sydney, R. Brown ; Joggins, J. W. D. 



9. S. planicosta, s. n. 



M. C. Sydney, R. Brown. 



Scars half hexagonal above, rounded below, lateral vascular 

 impressions elongate, central small 'punctiform. Ribs 1 T V inch 

 broad, smooth externally, longitudinally striate on ligneous surface. 

 Slight transverse wrinkles between the scars, which are distant 



