NIISSONIA. 



227 



39,305, A long- and narrow frond, associated Trith. Tmniopteris 

 vittata and other plants. 



I^ear Scarborough. Bean Coll. 



Other specitnens : — V. 2516 (short and basal segments), V. 2517, 

 V. 3520, 10,311 (a good example from Gristhorpe Bay), 12,398, 

 13,510, 13,513, 40,469(7, 52,582. 



Fig. iO. ^Xits.wiiia comptn (Phill.). 



A small portion of a large specimen in the Whitliy Museum (drawn by 



M. Seward). (Nat. size.) 



2. Nilssonia mediana (Leckenby, cs Bean MS.). 



[Quart. Journ. Geol. Soe. vol. xx. p. 77, pi. viii. fig. 3, 1864.] 



(PI. IV. Figs. 1-4.) 



1829. Cycadites tetuucaidis, PhilHps, Geol. Torks. p. 148, pi. yii. fig. 19. 



1841. Pterophyllum tenuieauJe, Morris, Annals, vol. vii. p. 119. 



1848. Fterophyllum temticauJe, Bronn, Ind. Pal. p. 1057. 



1849. Pterophyllum teniiicniile, Brougniart, Tableau, p. 106. 



