378 



MISS M. C. STOPES ON THE ELOEA 



[Aug. 1907, 



for reference. The impressions are of a fragmentary nature, even 

 from this relatively well-preserved band — except in the case of the 

 (r'mfo/o -leaves, some of which are practically perfect, and show the 

 veining of the lamina, and in some cases (after suitable treatment) 

 the minute detail of the epidermis. 



From the fragments of plants from this one spot, the following 

 species were identified l : — 



Equisetites Beani (Bunb.) (?) base of 

 stem. 



Equisetites columnaris, Brongn., inter- 

 nodes, nodes, leaves, and nodal discs. 

 (See PI. XXVII, fig. 1.) 



Equisetites broraensis (sp. nov.) nodal 

 discs. (See PI. XXVII, fig. 2.) 



Coniopteris hymenophylloides (Brongn.) 

 leaves. 



Coniopteris quinqueloba (Phill.) leaves. 



Todites Wittiamsoni (Brongn.) leaf. 



Cladophlebis denticulata (Brongn.) 

 leaves. 



Dictyophyllum sp., leaves, very frag- 

 mentary. 



Zamites sp. (?) separate pinnules, 

 very long thin type. 



Otozamites (1) separate pinnules. 



Ginkgo digitata (Brongn.) leaves. 

 (See PL XXVII, figs. 3-5.) 



Cheirolepis sp., fragments of stems 

 with leaves. 



As well as several impressions which, though recognizably different from the 

 above and from each other, were not specifically determinable. 



By counting the numbers of individuals of each species in the 

 collection, it was ascertained that Equisetites columnaris and 

 Ginkgo digitata were considerably the most numerous of the plants. 

 Most of the species in the foregoing list are identical with those 

 represented in the flora of the Inferior Oolites of Yorkshire [see 

 Prof. Seward's ' Catalogue ' (00)], although the number of species 

 recorded from the latter locality is very much greater than from 

 the bed at Brora, as it has been known and collected from for so 

 long a time. 



Not many of the Brora plants call for special remark, for most of 

 them, although sufficiently well-preserved for identification, do not 

 reveal any detail previously unknown about them. 



Prof. Seward describes but two species of Equisetites from the 

 Inferior Oolite of Yorkshire, cutting down the many specific names 

 and synonyms to Equisetites Beani and E. columnaris. The latter 

 is common in a fragmentary condition in the Brora beds, but it is 

 noticeable that, although all the stems and leaf-sheaths vary from 

 10 to 30 mm. in diameter (see PI. XXYII, fig. 1), there are 

 also numerous nodal discs similar to that described and figured 

 by Prof. Seward (op. cit. pi. xix, fig. 4), but of very much smaller 

 size, namely, 2 to 5 millimetres in diameter (Prof. Seward's figured 

 specimen measures about 20 mm.). These are plentiful and well- 

 preserved, but entirely isolated impressions (see PI. XXVII, fig. 2) ; 

 and, although it is possible that they may be the nodal diaphragms 

 of very small stems of E. columnaris which are not otherwise pre- 

 served, yet it is equally possible that they represent an entirely 

 distinct species. For the sake of description, because they are so 



1 I am much indebted to Prof. A. C. Seward, F.R.S., for his kindness in 

 helping me to determine two or three of the more difficult fragments. 



