FEOM THE HUTTON COLLECTION. 85 



PTERIDOPSIS, nov. gen. 



Pteridopsis plumosa, nov. spec. Plate 3. 



Type — Pteridopsis plumosa, nov. gen. et spec, 111. Foss. 



Pits, pis. 44, 63. 



? Lebour, 111. Poss. Pits., pi. 44. 



? Lebour, 111. Poss. Pits., pi. 63. 



155. — Pteridopsis plumosa, nov. gen. et spec. (? Lebour, 111. Foss. 



Pits., pi. 44). Type. 

 Only a portion of the rachis preserved, which is irregularly 

 branched and finely striated. The leaves or pinnules are long, 

 narrow, curved, and with the margins nearly parallel. A 

 distinct mid-rib, from which there is a strong nervation cross- 

 wise or at right angles to the mid-rib, as in the genus 

 Alethopteris, with which it was at first sight arranged. 

 Loc. — Shale above the Bensham Seam, Jarrow. (H. C. 195). 



Remarks. — This fern is of very irregular mode of growth. 

 The stem or rachis is strongly striated and throws off lateral 

 branches and tufts of long curved leaves or pinnules which give 

 it somewhat the appearance of a plume of feathers. The pin- 

 nules are long and gently tapering to a point, with a central 

 mid-rib with strongly impressed veins set at right angles to the 

 mid-rib, as in some species of Alethopteris. Only two speci- 

 mens have been examined, which are figured in the references 

 given above. Plate 3 is in the Collection of ISTat. Hist. Society. 



(MARIOPTERIS, Zeiller). 



Pecopteris muricata (Schlotheim sp.). 



Type — Pilicites muricatus, Schloth., Plor. d. Vorw., 



pi. 12, f.21,23. 



Pecopteris muricata, Brongt., Hist. Veg. Poss., pi. 95, 



f. 3, 4; pi. 97. 

 ,, laciniata, L. et.H., Poss. Plora, pi. 122. 



,, ,, Lebour, 111. Poss. Pits., pi. 29. 



Sphenopteris macilenta, Lebour, 111. Poss. Pits., pi. 19. 

 Neuropteris heterophylla, Lebour, 111. Poss. Pits., pi. 14. 

 Neuropteroid frond? Lebour, 111. Poss. Pits., pi. 15. 



Sphenopteris latifolia, Brongt., Hist. Veg. Poss., pi. 57, 



f. 1, 2, 3, 4. 



