36 
Lepidodendron appendiculatum, occurs at Bank Top, near 
Barnsley, where a noble specimen, nearly forty feet in 
length, was broken up by the workmen in getting the stone 
for the inclosure of Barnsley Common. In the sandstone 
and millstone grit of the West Riding, the Lepidodendron 
obovatum is tolerably extensively distributed, fine specimens 
having been obtained from the Headingley Moor and Bram- 
ley Fall quarries. The Lepidodendron Sternbergia, elegans, 
gracile, and selaginoides, are not unfrequent in the shales at 
Gildersome, Barnsley, Elsecar, and Low Moor; quadrangu- 
laris at Bierley ; and coelata is also recorded as a Yorkshire 
species by Morris. Of the supposed cones of these plants, 
Lepidostrobus, examples of ornatus and variabilis are gene- 
rally found in the same localities, and very frequently 
associated with a mass of leaves of Neuropteris, Pecopteris, 
&c. Of the genus Halonia, which, like Lepidodendron, pro- 
bably holds an intermediate place between the Lycopodiaceae 
and the Coniferse, four well-marked species occur, the 
gracilis, regularis, tortosa, and tuberculosa, at Low Moor 
and Dewsbury. Of the last species one specimen in the 
possession of the Philosophical Society, procured from the 
sandstone at Potternewton, is the most perfect example I 
have ever seen, and possesses peculiar interest, as not 
only exhibiting the mode of branching of this genus, a 
point upon which nothing positive was known, but also 
apparently combining the characters of the genera Halonia 
and Knorria; the extremities of the branches belonging 
to the former, and the base or main stem to the latter.* 
Of Knorria, however, if really distinct, there are several 
large fragments in the Museum of this Society ; but as 
little is known of the species, I have not been able to 
identify them. In Artis's Antediluvian Phytology is the 
figure of a plant having the scaly stem of the Lepido- 
* Plate I. 
