

On some New Species of Lagenostoma, a Type of Pteridospermous 
Seed from the Coal Measures. 
By E. A. NeweExu Arser, M.A., F.LS., F.G.S., Trinity College, Cambridge, 
University Demonstrator in Paleobotany. 
(Communicated by D. H. Scott, F.R.S. Received January 10,—Read 
February 23, 1905.) 
[PLates 1 AnD 2.] 
CONTENTS. 
PATRUGOGUINCOLON fete o aoe ons. Bek haa tesa aks em ea tad a oecaklns Suleses 245 
A. Lagenostoma Kidston, sp. nov.— 
(1) History, Locality, and Horizon of the specimens 247 
(2) Morphology of the see@) c2.-dscconcaces-csssacssseeee 247 
(3) Position of the seed on the plant ...............665 250 
CA PS UMIMIN BE Vio. Sash coco ehdes Maeno ted adewceuatmen ee cataaes 251 
B. Lagenostoma Sinclairi, Kidston M.S.— 
(1) History, Locality, and Horizon of the specimens 251 
(2) Morphology of the seed and “cupule” ............ 252 
(3) Position of the seed on the plant .................. 253 
Ad) SUMMIMN ATV fe eaters cod ces sscuueenscusmneiaetee soaeees case oee 254 
GeEnCEAICOMEINSIONS! 5.3 ce cates oc nado Sv enee asec adeceiasiesswneeseteess 255 
mxplanation of the plates” 2.4.21 0.ccccesswssscecsaeeecses es cseeede 258 
Introduction. 
The recent discoveries of the female fructifications of more than one: 
member of the Cycadofilices mark an epoch in-the history of the study of 
this great Paleozoic group, and give a valuable clue to the phylogeny of the 
Cycads, an at one time numerous and important class of Spermophytes, some 
of which still survive at the present day. 
It is somewhat remarkable that the discoveries af the seeds of two such 
diverse genera as Lyginodendron and Medullosa should have followed so 
closely on one another. In May, 1903, Professor Oliver and Dr. Scott* 
showed that a petrified seed of the Gymnospermous type, previously known 
as Lagenostoma Lomaaxi, Will. M.S., belonged to Lyginodendron, a genus of 
Cycadofilices possessing much divided fern-like foliage of the Sphenopteris: 
* Oliver and Scott, “On Lagenostoma Lomaxi, the Seed of Lyginodendron,” ‘ Roy.. 
Soc. Proc.,’ vol. 71, p. 477, 1903 ; and “On the Structure of the Palzozoic Seed Lageno- 
stoma Lomaxi, with a Statement of the Evidence upon which it is referred to Lygino- 
dendron,” ‘ Phil. Trans.,’ B, vol. 197, p. 193, 1904. 
