18 NATHORST. FOSSIL PLANTS OF FRANZ JOSEF LAND. [NORW. POL. EXP. 



two can scarcely be doubted. It is much smaller than the other specimens. 



Probably the specimen represented by fig. 16 should also be placed here, 

 but it is so torn that any determination of it is very 

 uncertain. The specimen figured in the accompanying 

 text-figure (fig. 3) differs by being narrower-winged, but 



Heer's fig. Ib is also more narrow-winged than his 

 Fig. 3. Pityospermum. 



fig. la. Heer is of opinion that Pinus Maakiana may 

 possibly belong to the genus Tsuga. 



Pityospermum cf. cuneatum Nathorst. 



PI. II. fig. 14. 



Owing to the smallness of the seed itself (scarcely one third of the 

 seed-wing) and what appears to be an almost truncate apex of the wing, and 

 also as regards its dimensions, this specimen seems closely allied to Pityo- 

 spermum cuneatum from the Upper Jurassic strata of Spitsbergen, already 

 described by me *. However, the identity of the two owing to the incompleteness 

 of the specimen in question cannot be considered certain. 

 Pityospermum Nanseni n. sp. 



PI. II. figs. 12, 13. 



As a type for this species we must first of all reckon that specimen re- 

 presented in the annexed text-figure (fig. 4) which, of all the seeds obtained, 

 is the most complete. It is about 11 mm. in length, the 

 seed itself is almost round, not quite hah* as long as the 

 wing, this latter having its greatest breadth about the middle. 

 As regards its form in other respects, I refer the reader to 



the figure; the wing shows as usual, fine striae radiating 

 Fig- 4. 

 Pityospermum Awards the outer margin. 



Nanseni. Another complete specimen to be entered here is that 



Natural size. 



figured by Newton and Teall in their PI. 38, fig. 6. It has 

 the same form and dimensions, differing only by the outer margin of the 

 wing stretching as far as the lower side of the seed. 



Here we must certainly also include the specimen on PI. II. fig. 13, 

 possibly also fig. 12, the wing of which, probably owing simply to its state 

 of preservation, appears narrower. 



1 Nathorst, 'Zur mesozoischen Flora Spitzbergens', p. 63, pi. 5, fig. 38. 



