r 



22 



CANADIAN FOSSILS. 



12. Sigillaria simpUcitas, Vanuxom. — Report Geology of New York, p 

 -^ 190, Fig. 54.— J. G. S., XVIII, 308.-U.D., & M.D., New 

 York. 



** Ligneous surface with narrow, slightly rugose elevated ribs, about a 

 quarter of an inch wide, in a stem five inches in diameter. Leaf- 

 scars indistinct . " 



{Syringodendron graeile, Dn.— J. G. S., XVIII, 308 ; PI. XIII, 

 Fig. 14. — M.D., Akron, Ohio. It is probable that the beds from which tL's 

 plant was obtained may be Lower Carboniferous.) 



To the above I have no new species to add, nor have I any additional 

 facts to communicate. It may be observed that of the above species, S, 

 Vanuxemii represents the group of ribless Sigillariae to which S. elegans 

 of the coal measures belongs. The other two species are predecessors of 

 the ordinary ribbed Sigillarise of the Carboniferous. From the paucity of 

 specimens of Sigillariae it would seem either that these plants were rare in 

 the Devonian period, or that the localities hitherto explored were excep- 

 tionally unfavourable to their growth or preservation. In Europe, Devo- 

 nian Sigillariae would seem to be still more rare, even if we regard S. 

 Hausmanniana of the lower Devonian of Sweden as a good species, which, 

 I confess, appears to me doubtful. 



All of the above species, with one exception, seem to have been of small 

 size, a remark which also applies to many of the Devonian Stigmariae, the 

 roots of these trees. 



Roots of Siqillabi^. 



13. Stigmaria perlata, N. S.— (PI. Ill, Fig. 32.)— J. G. S., XVIII, 

 309.— M.D., St. John, New Brunswick.* 



Areoles large, distinoiy surrounded by a circular rim or margin; bark irre- 

 gularly rugose. '- ' ' X ■ ■* 



* I have Been in London specimens of a large stigmaroid root in some respects similar 

 to the above species. It is from the Upper Devonian of Kiltorcan in Ireland, and is stated 

 by Mr. Bailey to be the root of an apparently lepidodendroid tree, with round scars, and 

 In the old stems a tendency to vertical ribs. It is labelled Sagenaria Baileyana, but is 

 evidently not a Sagenaria, and of the type of the plants named by Haughton Cyeloi- 

 tiffma. Some of my Devonian Stigmariae may have belonged to similar plants. See infr» 

 under " Cyclostigma." 







\ ■ 



■v, 



' 



i 



