ae, ee 
ifsuch are present, either Ihave mistaken then for the edges of tra- 
cheides lying below the section plane on account of their small size, or 
I have not been abhe to differentiate them from some of the more 
markedly meandering tracheides. Occasionally the latter surpass 
those illustrated by Williamson in the anomalous sinuosity of their 
courses. 
It is possible that the leaf traces were so distant, on account 
of the large growth of the tree, that the sections have not happened to 
intercept any of them in their passage, a condition that might occur in 
a very old Leiodermarian or a Rhylidolepis type. The small rays shown 
in the section are presumably accessory, the very much elongated 
ones being prohably primary. The xylem wedges are fairly regular, 
and there is no evidence of anastomosis such as appears in the exoge- 
nous wood of Stigmaria. 
Evidence of bacterial action is very distinctly shown lucally in the 
disintegration of the reticulate walls, as illustrated in fig. 3. Under a 
higher magnification, fig. 4, the specimen has the very distinct aspect 
of having natural colonies of « basterioids » . 
Locality: Near S&o Sepé, Rio Grande do Sul. Apparently in red 
beds (weathered) 100-200 meters above the S. Jeronymo coal. Lot 3919. 
The type is BR 22. 
Sigillaria sp. 
Pl. vi, fig. 10, 10 a. 
Large megaspores similar to those illustrated by Carruthers in 
4869 and referred by him (1) to Flemingites (Lepidodenron) Pedroanus 
occur in great abundance in the roof of the Bonito coal near Minas, 
where they constitute the greater part of the rock-forming sediments 
in certain layers of the coaly shale. The aspect of the shale is photogra- 
phically shown in Pl. VI, fig. 10, the features of the spores being more 
distinctly seen in the enlargement, fig. 10 a. They vary from 1.25 mm 
to 1.75 mm in diameter when completely flattened. The triradiate 
vent is discernable in many of the specimens. As with the inegaspores 
discribed from Rio Grande do Sul by Zeiller (2) there is nothing re- 
(1) Geol, Mag., vol. vi, pg. 1538, pl. v. figs. 2-5. 
(2) Bull. Soc. geol. Fr. (3) vol. XXIII, 1895, p. 610, fig. 2. 
