1 77 
An Exhibit of Palaeozoic Seeds. 
seems to be emerging from the series of the Cycadofilices, till last 
year known only by their vegetative organs, the suggestion has been 
made that it would be of some interest if an authentic record of 
the specimens exhibited could be drawn up, more especially as many 
of them are quite unique and it is hardly likely that they will ever be 
assembled together again. 
The present note is an enumeration of the specimens shewn, 
which fall under four headings. (1) The Cordaiteae, a group of 
Palaeozoic gymnosperms long ( known to fossil-botanists, (2) tha 
Lyginodendreae with their “ Lagenostoma ’’-seeds, (3) the Medul- 
loseae, and (4) Lycopodineae which include Lepidocarpon and 
Miadesmia, both with seed-like fructifications. Groups (2) and (3) 
constitute, for the moment, the proposed new class, Pteridospermeae. 
It may be added that the whole collection has been accepted 
for temporary exhibition by the Trustees of the British Museum, 
and that they will remain on view at the Natural History Museum 
(where they have been admirably arranged by Mr. E. A. N. Arber) 
for some little time. 
In the following enumeration the numbers of the specimens in 
their respective collections is given, when available, in square 
brackets thus [ ]. K = Kidston Collection, S = Scott Collection, 
U.C.L. = University College, London, Botanical Department 
Collection. 
In its present form the Collection is enhanced by the inclusion 
of additional specimens belonging to the Geological Department of 
the Natural History Museum. For the purposes of this note the 
specimens (or groups of specimens) are also numbered consecutively. 
(I.)-CORDAITEAE. 
Foliage : 
1. Cordaites (Dorycordaites), entire leaf; M. Coal Meas., Barnsley, 
[K 2907 ]. 
2. C. principalis, Germar, apex and base of leaf; M. Coal Meas., 
Barnsley, Figured, Trans. Roy. Soc., Edin., vol. 37, pi. iv., figs. 8 
and 16. [K 1478 and 9]. 
3. Phots, vase, bundles of leaves, lingulatus and principalis types. 
Pernio.-carb., Grand ’Croix. Figured, New Phyt., vol. II., pi. ix., 
figs 1 and 3 [U.C.L.] 
4. Leafy branch, Dammara robusta, for comparison. 
Stem : 
5. Cordaicladus (branch of C. principalis with leaf-scars) ; L. Coal 
Meas., Kilmarnock. Figured, Trans. Roy. Soc., Edin., 37, pi, iv., 
fig 17 [K 1561]. 
