16 ARKIV FÖR BOTANIK. BAND 13. N:0 7. 



A specimen of a Sagenopteris, figured in pl. 2, fig. 11, 

 and possibly some other more imperfect fragments, appear 

 to belong to S. Nilssoniana (Brgn.) Ward (= S. rhoi folia 

 Presl). It represents a single leaflet, which seems to 

 have been of ovate shape. The venation consists of a dis- 

 tinct midrib and secondary veins anastomosing to form a 

 network with meshes of the shape characteristic of the spe- 

 cies. The specimen displays no difference whatever from 

 typical Sageriopteris Nilssoniana, but it must be admitted 

 that this species is not well defined against S. Goeppertiana 

 ZiGN. from the Jurassic of Italy and other districts. 



Sagenopteris Nilssoniana is fairly common in the coal- 

 bearing series of north-western Scania. It is known from 

 Pålsjö, Sofiero, Hör and Dompäng, i. e. from beds belonging 

 to the upper Rhaetic and the Lias. Outside Sweden it is 

 known from many Rhaetic and Liassic areas, inter alia, from 

 the Bagaa-flora of Bornholm. 



Nilssoiiia sp. 



Pl. 2, figs. 12—15. 



Nilssonia?, Moberg: Bidrag till känned. om Sveriges mesozoiska 

 bildn. Bih. K. Svenska Vet- Akad. Handl. Bd 19. Afd. 2. N:o 2. 

 1893. P. 14. 



[For further reference see Nathorst: Über die Gattung Nilssonia 

 Brgn. K. Svenska Vet. Akad. Handl. Bd 43. N:o 12. 1909.] 



Several specimens of a Nilsso7iia occur at Rödaisberg, 

 but they are too small and fragmentary to permit of a de- 

 finite identification. The best specimens are shown in pl. 2, 

 figs. 12—15. The fragment in fig. 12, shown in magnifica- 

 tion in fig. 13, may represent an entire segment of a species 

 of the N. poly mor pha-ty pet, but it is not certain that it be- 

 longs to that species, which usually has much larger dimen- 

 sions. The fragment in fig. 14 appenrs to represent a por- 

 tion of ati entire frond, not cut up into segments. In both 

 specimens the veins are of the characteristic Nilssonia- type: 

 they are denser than is usually the case in N. polymorpha, 

 but in small specimens of that species the veins may be 

 fairly dense, too. 



A peculiar character is indicated in fig. 13, viz. the 

 occurrence of small dots in the interspaces between the veins. 



