8 ERNST ANTEVS, THE SWEDISH SPECIES OF PTILOZAMITES NATH. 
described under other names really belong to it. One or two forms I will, however, 
mention. 
The fossils from the Indian Gondwanas described by OLDHAM as Ptilophyllum 
(Palaeozamia) bengalense (1863, p. 27; pl. 19, figs. 1, la, 2, 2 a, 2 b, 6) and Pt. 
(Pal.) bengalense var. obtusum (1863, p. 28; pl. 19, figs. 3—5), and referred to Ptiilo- 
zamites by NATHORST (1878 a, p. 22) belong to Otozamites according to FEISTMANTEL 
(1877, p. 10). — Cardiopteris Zuberi SzAJN. (SzAJNOCHA 1888, p. 15; pl. 2, fig. 1), from 
the Rhaetic of Argentina, NATHORST (1889, p. 202) shortly afterwards placed under Ptilo- 
zamites. Judging, however, from SzAJNOCHA”s drawing it is also possible to conceive 
that the frond was bipinnate, and accordingly belonged to Ctenopteris. Later on, 
Kurtz (1896, p. 448), no doubt wrongly, wrote in favour of this form being a 
Thinnfeldia lancifolia (Morr.) [= Dicroidium lancifolium (MORR.) GotH.] — Some 
fragments described by NATHORST (1897, p. 25; pl. 1, figs. 20, 21) from the Jurassic 
of Spitzbergen probably represent a species closely related to Piilozamites Nilssoni 
NATH. 
Species of Ptilozamites have been found in several localities in Scania, and are 
very characteristic plants of the Rhaetic deposits there. Further, the genus, as far 
as I know, is represented in the Rhaetic deposits at Seinstedt, Germany, in the 
Rhaetic of Argentina, and in the Jurassic of Spitzbergen. 
According to the delimitation of different species given in this paper Ptilo- 
zamites is represented in Sweden by Pt. Nilssoni NATH., Pt. fallax NAtTH., Pt. Heeri 
NaATH., Pt. Carlssoni NATH., and Pt. Blasii (BRAUNS) NATH. 
Ptilozamites Nilssoni Nara. 
PITE fos Np ERE SS SS OEp Ito Hos OR 
Ptilogzamites Nilssonmi, NATHORST 1878 a, pp. 7, 23; pl. 3, figs. 1—5, 8. 
Nilssomi var. longior, NATHORST 1878 a, p. 23; pl. 3, figs. 6, 7. 
Ctenopteris? falcata, NATHorRsT 1878, pp. 11, 52; pl. 7, figs. 7—9. 
Ptilogamites falcatus, NATHorRsST 1878, p. 11. 
» Nilssoni, NATHORST 1879, p. 64. 
falcatus, NATHORST 849, p:r0S 5 DESS Apr Nog 
» Nilssont, NATHoORST 1880, pp. 64—66. 
» (Ctenopteris) Nilssoni, NATHoORST 1880, p. 83. 
falcatus, NATHoORST 1880, p. 66. 
» Nilssomi, NATHorRsT 1886, p. 123; pl. 12, fig. 9. 
faleatus, NATHorRST 1886, p. 123. 
Frond pinnate, comparatively long and narrow. Size varying considerably. 
Rachis bifurcating, bearing pinnae both below and above the point of bifurcation. 
Pinnae close to imbricate, pointing straight outwards or somewhat upwards; long 
and falcate, almost linear; short and broad, rounded; or short and narrow, cuneate; 
attached by the whole of the base; distal margin straight or somewhat concave, 
