Manchester Memoirs, Vol. xliv. (1900^, No. S, 19 



1836. Polypodites undans, Goppert, Foss. Farm., p. 345. 

 AletJiopteris insigiiis, ibid., p. 307. 

 Neiiropteris ligata, ibid., p. 205. 

 AletJiopteris Phillipsii, ibid., p. 304. 

 1849. Cladophlebis ligata, Brongniart, Tableau, p. 105. 

 1882. Pteris frigida, Heer, Flora Foss. Airt., vol. \i., j). 2"/, 

 pi. X., pp. 1-4 ; pi. xi. ; pi. .vii., fig. 2 ; pi. xiii., 

 fig. 2 ; pi. xvi., fig.s. I and 2. 

 P. lo7igipC7inis, ibid., pi. x., fig.s. 11 antl 12 ; pi. .\iii., 



fig. I. 

 P. ligata, ibid., pi. xvi., fig. 3. 

 1889. Cladophlebis dcnticiilata, Fontaine, Potomac Flora, 



p. 71, pi. vii., fig. 7. 

 1896. Cladophlebis Steivartiana, Hartz, Med. Groiil., 

 vol. xix., p. 231, pis. xi. and xii. 



The specimen shown in pi. iv., fig. 9, is an nnusualh- 

 perfect and well-preserved pinna, 12 cm. in length, bearing 

 linear falcate pinnules, of which the longest has a length 

 of 27 cm. ; each pinnule has a well-marked midrib, from 

 which are given off numerous forked lateral veins ; the 

 apex of the lamina is finely serrate. 



The example in the Manchester collection agrees 

 exactly with the larger specimen figured by Lindley and 

 Hutton as Pecopteris insig?iis, and this I regard as identical 

 with the English fern which Brongniart named Pecopteris 

 deiiticulata ; Xathorst has suggested that the fragment 

 figured by Lindley and Hutton as Pecopteris nndaiis, and 

 referred to by other authors as Phlebopteris nndans, may be 

 a fertile pinna o{ P. denticnlata. An examination of several 

 examples of P. iindatis enables me to confirm Xathorst's 

 opinion, but any discussion of the complex s\nonymy of 

 the present species must be reserved for the more detailed 

 description of the Jurassic plants, which will be published 

 in a forthcoming British Museum Catalogue. 



