ADDENDA TO VOL. I. 225 



ADDENDA TO VOL. I. 



Nathorstia valdensis (= Leckenbya valdensis\ gen. et sp. nov. 

 Vol. I. p. 145, PI. VII. Fig. 5, and PL IX. Figs. 2 and 2a. 



After the publication of the first volume of the Wealden 

 Catalogue, it was pointed out to me by Prof. Nathorst that his 

 name had been previously made use of by Heer for certain 

 marattiaceous ferns from the Cretaceous strata of Pattorfik, in 

 Greenland. 1 This oversight on my part was corrected in a short 

 note published in the Geological Magazine for 1 894, 2 and the 

 generic name Leckenbya suggested as a substitute for Nathorstia. 



Phyllopteris acutifolia ( = Sagenopteris acutifolia}. Vol. I. p. 143, 

 PL IX. Fig. 6. 



The generic name Phyllopteris was chosen for certain small 

 isolated leaflets, on account of the apparent absence of any 

 anastomosis of the lateral veins. The examination of more 

 perfect specimens has enabled me to detect true reticulate venation, 

 and to confirm Mr. Kufford's opinion that the leaflets should be 

 included in the genus Sagenopteris. 



Weichselia Mantelli (Brong.). Vol. I. p. 114. 



In the synonymy of this species, I included a plant named by 

 Nathorst Weichselia erratica, as probably identical with the English 

 Wealden form. Prof. Nathorst 3 has expressed some doubt as to 

 the correctness of this suggestion, his species being found in 

 a deposit which is probably of Upper Cretaceous age ; he adds 

 that there are no "Wealden strata in Sweden. 



Sagenopteris Mantelli (Dunk.). Vol. I. p. 132. 



In speaking of this species I referred to a plant described by 

 Velenovsky under the name of Thinnfeldia variabilis as probably 

 identical with S. Mantelli, and added, with regard to his use of the 



1 Fl. foss. Arct. vol. vi. 1882. 



2 Geol. Mag. 1894, p. 384. 



3 Letter, June 25, 1894. 



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