XLVIl] SCIADOPITYTES 367 



are surrounded by somewhat tangentially elongated cells, the other 

 cells between the stomata being much smaller. The cells on the 

 sloping sides of the groove bear cylindrical papillae. On the whole 

 the structure recalls that of the recent Sciadofitys though as Halle 

 shows there are certain differences. 



The second species, Sciadofitytes Nathorsti^, was discovered by 

 Nathorst in the Middle beds of Atanekerdluk in West Greenland. 

 The leaves are at least 40 mm. long and about 1 mm. broad : the 

 stomata are confined to the groove as in ;S. Crameri and numerous 

 papillae are borne on the borders of the median depression. The 

 stomata are not so crowded as in S. Crameri and differ less in size 

 from the other epidermal cells. These two species, though exhibit- 

 ing some similarity to Sciadofitys, can hardly be assumed to belong 

 to plants more closely allied to the recent Japanese Conifer than 

 to other existing forms. The occurrence of the characters described 

 by Halle may be recognised by adding the name Sciadofitytes after 

 the non-committal term Pityophyllum. 



1 HaUe (15) p. 512, PI. xn. figs. 16—29. 



