CZEKANOWSKrA. 279 



Schenk to refer the genus to the Conilerse rather than to the 

 Isoetacese.' 



"We have as yet no ahsolute proof of any organic connection 

 between the reproductive organs described by Heer and the 

 C%ekanowsMa leaves, but the evidence, so far as it goes, favours 

 the view that needles and seeds belong to the same plant. 



The surface of the shale from the Yorkshire plant-beds is 

 occasionally covered with an accumulation of the fine grass-like 

 leaves of C%elcanowshia, reminding one of the crowded needles 

 carpeting the ground in a pine forest ; some of the Siberian 

 specimens are met with in similar profusion on the surface of the 

 rock, and in the Ifew Jersey Amboy clays a species of Czehanowslcia 

 occurs in equal abundance." 



Several authors have represented CzelcanowsMa leaves as 

 occasionally diohotomously branched, a character in favour of 

 a comparison with Baiera and the Ginkgoaoese ; among the 

 numerous examples of the leaves of C%ehanowskia Murrayana that 

 I have examined, no absolutely certain case of branching was 

 found. The long unbranched leaves of Czehanowshia remind one 

 of the needles of Pinus longifoUa, Salisb., and other long-leaved 

 pines, but the branched type of leaf met with in some forms 

 of the fossil genus is not in accord with a comparison between 

 Czekanowshia and the Abietineae. "We may for the present regard 

 this genus as a Conifer of doubtful affinity, and as possibly 

 a member of the Ginkgoacese. 



Czekanowskia Murrayana (Lindley & Hutton). 



[Fossil Flora, vol. ii. pi. cxxi. 1834.] 



(Text-figures 48-50.) 



1829. Flabellariu? riminea, PhiUips, Geol. Torks. pp. 148 and 154, pi. x. 



fig. 12. 

 1834. Solenites Murrayana, Lindley & Hutton, Foss. Flor. vol. ii. pi. cxxi. 



1848. Solenites Murrayana, Bronn, Ind. Pal. p. 1156. 



1849. Isoetes Murrayana, Brongniart, Tableau, p. 105. 



1860. Isoetes Murrayana, tJnger, Gen. spec, plant, loss. p. 226. 

 1854. Solenites Murrayatia, Morris, Brit. Foss. p. 20. 



1 Schenk (67), p. 57. 



2 Newberry (95), pi. ix. fig. 16. 



