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



Pityophyllum cf. Lindstrdmi Nath. 

 PI. II. figs. 26-34a, 38. 



Pityophyllum Lindstrdmi Nathorst 'Zur mesozoischen Flora Spitzbergens,' 

 pp. 40, 67, pi. 5, figs. 13-15, 18-31; pi. 6, figs. 17, 18. 



The leaves of this species are generally 1 1.5, seldom 2 mm. in breadth 

 and often show a distinct midrib, at times with an indication of two mar- 

 ginal veins, and moreover finer longitudinal striae, which, I suppose, corres- 

 pond with the rows of stomata. No such transverse rugosities as exist in 

 the preceding species are present. On the lower (outer) side the leaves are 

 convex, but on the upper (inner) side concave, as is seen by the transverse- 

 section fig. 38, and moreover in many other specimens. For a more par- 

 ticular description I must refer the reader to my work cited above. 



Probably the two specimens, figs. 35 (enlarged 35a) and 36, should also 

 be included here, as they are probably to be considered as short shoots; if 

 this be so, the species must have had many leaves in each short shoot. 



The leaves in question are the most common fossils of the plant-bearing 

 stratum, and occur in most specimens of the rock. As in the collection from 

 Advent Bay, Spitsbergen, so also in Franz Josef Land there are accumulations 

 of broken coniferous leaves connected in such a manner that it must be de- 

 duced that they have been the abode of some phryganid larva. This seems 

 to indicate that the deposit, as is also probable from other reasons, has origin- 

 ated in fresh water. 



CARPOLITHES. Sternberg. 



Carpolithes sp. a. 

 PL II. figs. 8 and 8a (magnified). 



A somewhat oblique seed, the margin of which has evidently been sur- 

 rounded by a narrow wing. It may be compared with my Carpolithes sp. c. 

 from the Upper Jurassic strata of Spitsbergen (Nathorst, 1. c. p. 69, Taf. 5, 

 figs. 47 49, 51) though the specimen before us is far less symmetrical. 

 Among the conifers of the present day the seeds of Sequoia are rather like 

 it in appearance. 



