4 ARKIV FOR BOTANIK. BAND 10. w:o 14. 
ones. Some small, scale-like fronds from the Jurassic of Oregon 
have been hesitatingly referred by FONTAINE to Williamsonia 
and are described by Warp‘ as »Bracts of Williamsonia? No. 2.» 
These »bracts» look very like the Yorkshire fossils, but are de- 
scribed as thick and fleshy. Neither in the case of the American 
specimens is there any evidence that they have belonged to an 
inflorescence. They may be of the nature of scale-fronds or 
stipules, but the other possibility certainly deserves to be con- 
sidered too. 
The genus Cycadolepis, instituted by SAPORTA,’ has been 
extended by SEWARD? so as to include different kinds of scale- 
like leaf-structures of cycadean plants. Of forms referred by 
SEWARD to this genus there are some specimens of C. Jenkin- 
siana (TATE) from the Uitenhage formation of South Africa,’ 
which present a certain resemblance to the Yorkshire fossils. 
This is especially the case with the specimen in SEWARD'S pl. 4, 
fig. 6, which shows a distinct venation similar to that of the 
Yorkshire form in pl. 2, fig. 1, of the present paper. SEWARD 
notes the thinner and more leaf-like appearance of these fossils 
as compared with the specimens of Cycadolepis from the Weal- 
den strata of England. The objects are considered as protective 
scale-leaves, possibly borne on cycadean stems, although it is 
admitted that similar structures do not occur in existing cycads. 
A comparison is also made with the sheathing stipules of certain 
recent ferns such as Marattia, Angiopteris and Todea. I am in- 
clined to think, however, that Cycadolepis Jenkinsiana, like 
the similar Yorkshire fossils, might be considered, with equal 
probability, as belonging to the floral apparatus of some highly 
developed gymnosperm, perhaps of Bennettitean affinities. The 
possibility appears at least worthy of consideration. 
With the scale-like leaves described above may possibly 
be compared a fragment recently described by SEWARD from 
the Jurassic of Scotland. This fragment is mentionded as an 
1 L. F. Warp: Status of the Mesozoic Floras of the United States. 
Second paper. U. S. Geological Survey. Monographs. Vol. 48, 1905, p. 119; 
pl. 29, figs. 8— I2. 
? SapoRTA: Paléontologie francaise. Ser. 2. Plantes Jurassiques, vol. 
2, p. 200. 
3 SEWaRD: The Wealden flora, part. 2. 1895, p. 96. 
* SEwanp: Fossil Floras of Cape Colony. Ann. $8. Afric. Museum, Vol. 
4, part 1. 1903, p. 28, pl. 4, figs. 3—6. 
5 —: The Jurassic Flora of Sutherland. Trans. Roy. Soc. Edinburgh. 
Vol. 47, pt. 4, no. 23. 1911, p. 674. 
