THE JURASSIC FLORA OF SUTHERLAND. 



651 



References to figures in The 







Testimony of the Rocks. 







[Where Miller includes 



Remarks or identifications by 



Names under which the specimens 



more than one specimen 



Miller. 



are now described. 



under one figure, I refer 







to them as A, B, etc., 







reading from left to right.] 







Fig. 144 . 







Probably a new fern 



Cladophlebis denticulata Brongn., slightly 

 reduced ; Helmsdale. 



Fig. 145 . 



" A well-defined Pachypteris " 



Thinnfeldia sp. [Original not in the 

 collection.] 



Fig. 146 . 



Phlebopteris ..... 



Pterophyllum Nathorsti, Sew., \ nat. 

 size ; Helmsdale. 



Fig. 147, A, B . 



A, Miller compares it with Lyco- 



Fig. 147, A, indeterminable ; Helms- 





podium 



dale. 





B, " probably a true fern " 



B, IDichopteris sp., nat. size; Helmsdale. 



Fig. 149 . 



Imbricated stem .... 



Brachyphyllum sp., -|- nat. size; Helms- 

 dale. 



Fig. 150 . 





[Original not found in the collection.] 



Fig. 151 . 



" True Dicotyledonous leaf " . 



Hausmannia Buchii (And.), nat. size ; 

 Helmsdale. 



Fig. 152 . 



Miller compares this fragment with 



1 Dictyophyllum sp., slightly reduced ; 





Dictyophyllum 



Helmsdale. 



Since Hugh Miller's time very few additions have been made to our knowledge 

 of Scotch Jurassic plants. In 1870 Carruthers * described the Cycadean stem 

 Bennettites Peachianus from Helmsdale, Yatesia crassa, Y. Joassiana and Bucklandia 

 Miller i from Brora. In 1884 Mr T. Richards + published a short account of Cycadean 

 species contained in the Hugh Miller collection, and reference has already been made 

 to the Brora plants described by Miss Stopes. 



During the short visit of the Nordenskiold Greenland expedition to Thurso in 1883, 

 Professor Nathokst and some of his colleagues collected specimens of fossil plants in 

 the neighbourhood of Helmsdale. Since describing the Gunn collection I have 

 received from my friend Professor Nathorst a list of species provisionally named by 

 him from his material : it is satisfactory to find that in several cases his determinations 

 agree with my own. It is not improbable that an examination of the specimens in 

 Stockholm may result in the recognition of one or two forms which are not represented 

 in the British collections. 



In his paper on Mesozoic Cycadophyta, Nathorst \ describes one of his Helmsdale 

 plants as Beania Carruthersi Nath. , a species which differs from Beania gracilis Carr. 

 in its rather smaller dimensions and in the more crowded disposition of the sporophylls. 

 On each sporophyll are two spherical bodies which Nathorst suggested might be 

 microsporangia ; but he now informs me that he believes them to be small seeds, a 

 much more probable interpretation. 



* Carkdthers (70). t Richards (84). J Nathorst (02), p. 2], pi. i. figs. 14, 15. 



TRANS. ROY. SOC. EDIN., VOL. XLVII. PART IV. (NO. 23). 97 



