﻿32 SCOTT, Early History of Seed-bearing Plants. 



DESCRIPTION OF PLATES. 

 Plate I. 



Neuropteris heterophylla. Part of a large frond, showing a main 

 pinna, with secondary pinnae and leaflets. Nat. size. 

 From a photograph by Mr. R. Kidston, F.R.S, 



Plate II. 



Alethopteris Davreuxi. A species allied to A. lonchitica. Part 

 of a large frond, showing the branching rachis, with main 

 pinnae, secondary pinnae, and leaflets. Very slightly 

 reduced. From a photograph by Mr. R. Kidston, F.R.S. 



Plate III. 



Fig. i. Sphenopteris Honinghausi, the foliage of Lyginodendron. 

 Fragment of the highly compound frond, showing spiny 

 rachis with pinnae, pinnules, and small incurved leaflets. 

 Nat. size. From a photograph by Mr. R. Kidston, F.R.S. 



Fig. 2. Lagenostoma Lomaxi, the seed of Lyginodendron. Photo- 

 graph from a model by Mr. H. E. H. Smedley, F.L.S., 

 showing the seed in its cupule, which is lobed, and 

 studded with capitate glands. Magnified about 5 diam. 

 as compared with the actual seed when mature. 



Fig. 3. Neuropteris heterophylla. Large ribbed seed, attached 

 to a portion of the rachis, bearing characteristic leaflets. 

 cf. PI. I. x 2. From a photograph by Mr. R. Kidston, 

 F.R.S. 



Fig. 4. Trigonocarpon Parkinsoni. Small seed, showing cast of 

 internal cavity and micropylar canal, the whole surrounded 

 by the thick testa, which forms a broad wing on either 

 side of the micropylar canal. Nat. size. From the type- 

 specimen in the Hutton collection at Newcastle-upon- 

 Tyne. For this photograph I am indebted to Prof. M. C. 

 Potter, F.L.S. 



