344 
the flora of the carboniferous period, 
by robert kidstox, f.r.s., f.r.s.e., f.g.s. 
Second Paper. 
In the first paper, the Ferns, Equisetites, and Calamites were 
dealt with ; in the present communication the Lijcopodiacece, Spheno- 
phylleoe, Cordaitece, Coniferoe, and Ginkgoacece will be shortly con- 
sidered. 
LvCOPODIACEiE. 
Among the Carboniferous Lycopods a few are found of compara- 
tively small size, perhaps not much larger than some exotic species of 
Selaginella, whilst others, like Lepidodendron, attained to arborescent 
dimensions. 
No group of Carboniferous plants rises to the same importance 
as that of the Lycopodiacese. It comprises several genera and som.e 
of these contain many species. 
The Lycopods must also have supplied much of the material from 
which our coal seams are formed. Their importance in this respect 
can be judged by the fact that it is of frequent occurrence to find in 
coal, bands of over half an inch in thickness formed entirely of 
Lycopod spores. 
We shall now examine shortly the chief genera belonging to this 
group which occur in Britain. 
L— Lycopodite.e. 
Lycopodites Brongniart. Members of the genus Lycopodites 
are very rare in Carboniferous times ; only three species have come 
under my notice as British, and each has only been represented by 
a single specimen. One of these, Lycopodites ciliatus Kidston, is from 
Yorkshire and was collected by Mr. Hemingway. 
The Lycopodites are all small and had whorled or spirally-placed 
leaves. In Lycopodites guthieri Gopp. (Plate LXIY., fig. 1), for the 
