Yol. 69.] THE CLEVELAND DISTRICT OE TOEKSHIEE. 239 



over the veins are more elongated than the intermediate cells. 

 Numerous stomata are seen on the lower side, which has an 

 extremely delicate cuticle : here again the cells have very sinuous 

 walls, and are affected by the position of the veins. The stomata 

 are produced between the veins, and have two rather spindle- 

 shaped guard-cells and two subsidiary cells. These cuticles are 

 almost identical with those of Dietyozamites jolinstrupi from Born- 

 holm described by Prof. Nathorst l ; but the papillae, which are so 

 characteristic of that form, are not conspicuous here, and seem 

 to be absent from most cells, although a small central dot can 

 sometimes be made out. 



Cycadean Stem, cf. "Wielandiella sp. 



In the collection of Mr. Saunders, and also among the plants 

 from Marske at the Naturhistoriska Riksmuseum in Stockholm, 

 there are specimens showing the remains of stems which remind one 

 of the stems of Wielandiella that Prof. Nathorst described. 2 The 

 original stems seem to have measured about 1'7 cm. across, and 

 occasionally bifurcate into two portions which, however, did not lie 

 in the same plane. At the point of bifurcation another depression 

 is seen, possibty corresponding to another branch in a plane at 

 right angles, but, owing to its rather small size, more probably 

 representing the exit of a floral axis. No signs of flowers or 

 leaves are found; but below the bifurcation a number of some- 

 what rounded irregular markings are seen, representing the leaf- 

 scars. Nothing can be made out for certain as to the form of 

 these scars, but they seem to be almost absent from the branches 

 just above the point of bifurcation. In the latter region fine 

 markings are seen running transversely across the stem-cast at 

 more or less regular intervals, though it is not clear what they 

 represent. 3 In the lower parts of the stem the cast has a somewhat 

 irregularly-wrinkled surface. 



"While nothing can yet be said for certain as to the real naturo 

 of these stems, it is of some interest to note their occurrence in a 

 bed containing many Cycadean fronds, as also their similarity to 

 the stems of Wielandiella. It is to be hoped that further col- 

 lections may elucidate their nature. 



Cycadales (?). 

 Nilssonia mediana (Leckenby ex Bean MS.). 

 [Q. J. G. S. vol. xx (1864) p. 77 & pi. viii, fig. 2.] 

 This form, which has hitherto been recorded chiefly from the 

 Middle Estuarine Beds of the Scarborough district, seems to be 

 well represented at Marske. 



1 Nathorst (07) p. 12 & pi. iii, figs. 2-8. 



2 Nathorst (02) p. 9 & pi. ii, figs. 1-31 ; also pi. iii. 



3 Prof. Nathorst figures similar transverse striations on some of the stems 

 ■of Wielandiella; see Nathorst (02) pi. ii, figs. 2, 5. 10. & 20, 



