SEWARD: A NEW BRITISH CARBONIFEROUS FOSSIL. 237 
from #: palatinus in its smaller size, and in the possession of fine 
striations parallel to the spiral ridges. The latter character may 
well be due to the more perfect state of preservation of the Chemnitz 
specimens ; but whatever value may be attached to the supposed 
two 
regarded as a character of specific value. The latter possibility is 
hardly admissible, and very likely, had we more complete examples 
before us, we should find that the organism was gradually narrowed 
at the ends, as in the French and English specimens. 
Other fossils, similar in form to Fayolia, have been described from 
Upper Devonian strata in the States of New York and Pennsylvania, 
and from the much more recent Laramie formation. 
Under the head of ‘Remains of doubtful affinity and with 
unknown structure,’* Schenk has summarised our knowledge of 
Spirangium and Fayolia. In discussing the latter genus he points 
to the difference as regards general habit between the German and 
French, and we may now add the English, specimens ; the German 
forms appear to be portions of cylindrical stem Structures, in others 
the shape is not consistent with the idea of stem fragments. Another 
difference lies in the absence of a collarette and spines in the German 
rian a 
should be mentioned that Weiss refers to the occurrence of 
Spirally attached leaves in an example of Casuarina stricta, figured 
by Alex. Braun, as an instance of whorled appendages suddenly 
assuming a spiral arrangement.t Reference might also have been 
made to a similar phenomenon in Lguise/um stems, where the usual 
sheathing leaves pass into a spirally placed and continuous sheath. 
A figure given by Milde of £. ¢e/matejat shows a projecting spiral 
Sheath, with denticulate margin, not at all unlike the collarette of 
¥, dentata; but in the latter there are two spirally dis 
jena and in #gutsetum we have only one such structure. 
* Schenk. Die fossilen Pflanzenreste. (Handbuch der Botanik, 1888,) p. 185. 
t Weiss. Abh. Geol. Specialkarte von Preussen, etc., p. 153. 
Beitrige zur Kenntniss der Equiseten. Nova Acta Ac. Czes. Leop.-Car., 
vol xxiii., 1851. Pl. lvi., fig. 40. : 
August 1894. 
