Yol. 69.] THE CLEVELAND DISTRICT OF YORKSHIRE. 237 



T^NIOPTERIS Sp. 



Another specimen shows a fragment of the apical part of a 

 frond. It is well preserved, and shows a characteristic irregularly- 

 crenate or lobed margin. The apex again is not clearly seen, but 

 seems to have been very obtuse. The midrib is rounded, and is 

 about 1*5 mm. broad. The venation is characteristic. The veins 

 are crowded, and present a doubled appearance, owing to the 

 presence of a groove down the centre of each rather broad lateral 

 vein. They arise at intervals of 1 mm., but bifurcate almost at 

 their point of origin. They often fork again after an interval of 

 1 or 2 mm. ; but this second division may take place farther out, 

 or not at all. The resulting appearance is that of a large number 

 of stout veins running almost parallel and closely crowded : near 

 the margin about twenty-four veins occur in each centimetre. 

 This type of frond is again quite distinct from the common form 

 of T. vittata ; but, in the absence of further and more complete 

 specimens, its relationships need not be further discussed. 



"Wielandiella. (Anomozamites) nilssoni (Phillips). 



['Illustr. Geol. Yorks. pt. 1— The Yorkshire Coast '1829, p. 147 & pi. viii, 

 fig. 4.] 



This species, which has hitherto been recorded chiefly from the 

 Middle Estuarine Beds near Scarborough, occurs at Marske, and 

 also at Roseberry Topping. In both places portions of its very 

 characteristic fronds have been found, which agree closely with 

 those previously described under the name of Anomozamites 

 nilssoni. 1 Prof. Nathorst 2 has discovered fronds which are very 

 closely allied to these, in connexion with stems and characteristic 

 flowers, and has given the new generic name of Wielandiella to 

 them. I believe that we are perfectly justified in applying this 

 name to our Yorkshire specimens, though we have not yet discovered 

 their flowers. This view is further strengthened by the discovery 

 of stems at Marske which are very similar to the stems of the 

 Swedish plant, although we have as yet no evidence of the con- 

 nexion of these stems with any fronds. 



Cuticular preparations have been obtained from the Marske 

 specimens, and show characters which I regard as typical of the 

 Bennettitalean fronds. 



Otozamites eeistmanteli Zigno. 



['Flor. Foss. Oolit.' vol. ii (1885) p. 90 & pi. xxxiv, figs. 6-8.] 

 Prof. Seward in his ' Jurassic Flora ' employs this name for long, 

 narrow, linear fronds of the Otozamitean type. This type is repre- 

 sented at Marske. The fronds have a length of 15 to 20 cm. or 

 more, and a breadth of about 1*6 cm. The short blunt pinnae are 

 arranged at right angles to the rachis, are placed on its upper side, 



1 Seward (00) p. 204 & text-fig. 36. 



2 Nathorst (02) pi. i, figs. 26-35, pi. ii, figs. 1-31, & pi. iii: also Nathorst 

 (092) p . 22. 



