NILSSOXIA. 



227 



39,305. A long and narrow frond, associated with Taniopteris 

 vittata and other plants. 



Near Scarborough. Sean Coll. 



Other specimens : 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, 52,582. 



FIG. 40. Nil&sonia compta (Phill.). 



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

 M. Seward). (Nat. size.) 



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



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

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



1829. Cycadites tenuicaulis, Phillips, Geol. Yorks. p. 148, pi. vii. fig. 19. 



1841. Pterophylhim tenuicattle, Morris, Annals, vol. vii. p. 119. 



1848. Pterophyllum tenuicaule, Bronn, Ind. Pal. p. 1057. 



1849. Pterophyllum tenuicauk, Brongniart, Tableau, p. 106. 



