8 HALLE, ON THE SWEDISH SPECIES OF SAGENOPTERIS PRESL AND ON HYDROPTERANGIUM NOV. GEN. 



cells are not quite so distinct. In pl. 3, figs. 6 — 9 the shape of the cells and the 

 stomata is seen. 



In the specimens of S. Nilssoniana from Pålsjö some of the cells of the epi- 

 dermis differ from the rest by thicker walls and a darker colour, as will be seen 

 from figs. 6 and 7, pl. 3. The cnticle of each of these cells projects in a torn and 

 indistinct elevation. These projections somewhat suggest papillse, but seem to repre- 

 sent rather the remaining cuticularized bases of epidermal hairs. They occur on 

 both sides but are very scarce on the upper surface. Figs. 10 and 10 a, pl. 3 repre- 

 sent one of these projections more magnified. 



In the few and poor specimens of the cuticle, which I have been able to pro- 

 cure from the Hoer-material, there are no traces of these hair-like elevations. Also 

 Schenk's (1, pl. 13) drawings of the cuticle of specimens from Franconia show nothing 

 of the same kind. As, besides, the specimens from Pålsjö belong to the uppermost 

 Rhsetic, those from Hoer to the Lias, it is possible that they represent differcnt species, 

 though there is no difference in shape or other outward characters. But on the other 

 hand these presumptive hairs cannot well be regarded as sufficient characters for a 

 specific separation. 



The wide distribution and great variability of this species is well known. I do 

 not pretend to distinguish it in all cases from S. Goeppertiana Zign. The small 

 specimens from Hoer (pl. 2, figs. 16 — 18) resemble almost more the latter species but. 

 as all the larger leaves seem to belong to 8. Nilssoniana, I have included them 

 under that species. Some narrower leaves recall 8. Phillipsi, but also in this case it 

 is impossible to arrive at any satisfactory conclusion. 



8. Nilssoniana has hitherto been found at Pålsjö, Sofiero, Hoer and Dompäng. 

 The first locality belongs to the uppermost Rhsetic, the others to the lower Lias. — 

 Some few specimens of a Sagenopteris from Rödaisberg in the SE. part of Scania 

 may also belong to this species. They are, however, too fragmentary to allow a satis- 

 factory determination. 



Sagenopteris conf. Mantelli (Dunker). 



(Pl. 1, fig. 18—21.) 



1846. Cyclopteris Mantelli Dunker (1). P. 10; pl. it. tigs. 4, 5. 



1849. Adiantites Mantelli (Dunk.) Brongniart (4). P. 107. 



18G9. Aneimidium Mantelli (Dunk.) Schimper (1). P. 48C>; pl. 31, fig. 13. 



1871. Sagenopteris Mantelli (Dunk.) Schbnk (2). P. 222; pl. 31, fig. 5. 



1884. Sagenopteris Mantelli (Dunk.) Sewakd (1). P. 130; pl. 9, figs. 4, 5. 



Some few specimens of a Sagenopteris from Kurremölla in the SE. part of 

 Scania seem to belong to this species. Only detached pinnse are represented. They 

 are very variable in shape, generally obovate or elliptical. The margin is entire or 

 slightly undulating. The specimen fig. 19, pl. 1, is somewhat different, the shape of the 

 pinna being narrower and more elongated. It may perhaps not belong to this species. 



