cs es 
pteris, which has never been accepted by paleobotanists, is confirmed 
by the material collected by the present Coal Comission. Neither of 
the types was specifically determined. 
The presence of Glossopteris in the Brazilian coal fieldes was 
again reported, in 1872, by Liais, (1) after reviewing Plant’s strati- 
graphy and examining his collections. Healso noted the occurrence 
of the genus Sphenopteris as well as Calamites in the same flora. The 
beds are regarded by Liais as Jurassic or Triassic. No further disco- 
veries of fossil plants were made known until 1887, when Derby 
wrote to Waagen (2) of finding Dadoxylon-like wood with stems and 
leaves of Lepidodendron in the State of Sao Paulo. Two years later 
a very interesting petrified stem, including both vascular cylinder 
and cortex, was described by Renault (3) as Lycopodiopsis Derbyi. 
The specimen is said, on the authoriby of Derby, who forwarded 
the collection to Renault, to have been associated with Psaronius 
and Cordaitalean woods in beds, which are not far from the hori- 
zon of the vertebrate remains described by Cope as Stereosturnum 
tumidum. 
The coal basin of the Arroio dos Ratos in Rio Grande de Sul was 
described by Hettner (4) in 1891 and by Dahne (5) in 1887 and 1893, 
the former having collected, at the Arroio dos Ratos mine, fossil plants 
some of which were sent by him to the Berlin Museum. 
He regarded them as Triassic in age. Hettner, who Stated that 
professor Koken had recognized «Glossopteris flora» elements in his 
collection, wasthe first seriously to call attention (6) to this most im- 
portant fact, the contirmation of which has since aroused the keenest 
interest and expectancy on the part of both paleontologists and geolo- 
gists. Accordingly, in 1895, we find (7) the distinguished French 
(1) Climats, geologie faune et geogr. botanique du Brazil, Paris, 1872, pp. 201—203. 
(2) Waagen, N. Jahrb. f. Min., 1888, Vol. I, p. 1472; Rec. Geol. Surv. India, 
Vol. XXII pt. 2, 1889, p. 69. 
(3) Comptes Rendus, Vol. CX, p. 809; Bull. Soc. hist. nat, Autun, Vol. Til, 1892, 
p. 109, pl. VIII. 
(4) Zeitschr. d. Gesell. f. Erdkunde zu Berlin, Vol. XXVI, pp. 84-144. Sec pp. 
91 and 4125. 
(5) Relatorio das exploracGes geologicas e medigdo das datas mineraes feitas por 
ordem da Companhia das minas de carvao de pedra do Arroio dos Ratos, Rie de 
Janeiro, 1887; also A mineracio de carvaoc as concessées da Companhia estrada de 
ferro e minas de Sio Jeronymo no Estado do Rio Grande Sul, Porto Alegre, 1893. 
(6) Steinmann, Amer. Nat,, Vol. XXV, 1891, p. 857. 
(7) Comptes Rendus, Vol. CXXXI, 1895, p. 961; Bull. Soc. geol. Br., Vol. 
XXIU, 1896, p. 601. 
