170 



PTEBIDOSPERMS 



CH. 



drawn attention to a note by Prof. Duns published in 1872 on 

 the juxtaposition of seeds and fronds, and Mr Howse 1 in his 

 Catalogue of the Hutton plants considers that the seeds were 

 borne on the Eremopteris leaves ; in his synonymy of E. artemisae- 

 folia he includes Cardiocarpon acutum Lind. and Hutt. as the 

 'spore-cases or sporangia.' The Eremopteris seeds are of the 

 platyspermic (Samaropsis) type, broadly oval and about 7 mm. 



FIG. 443. Eremopteris artemisaefolia. A, part of a frond with associated seeds 

 of Samaropsis acuta; B, rhizome with fragments of fronds; C, pinnule. 

 (Drawn by Mr L. I). Sayers from specimens in the Hutton Collection, New- 

 castle. A, B, f nat. size.) 



long with an obtuse base and two slightly divergent acute processes 

 at the apex (fig. 444). Some specimens in Dr Kidston's collection 

 from the Lower Coal Measures of Midlothian, which were associated 

 with Eremopteris fronds, are preserved as mummified cuticular 

 membranes and on microscopical examination they show clearly 

 the presence of a pollen-chamber. The seeds are of the Sama- 

 ropsis type. The drawings reproduced in fig. 444 were made 

 for me by Dr Kidston from two specimens, in his collection, 



1 Howse (88) p. 45. 



