— 587 — 
A fragment gathered from the detritus about 4 1/2 kilometers 
(160-161 kilo. post) east of Santa Maria Station, in Rio Grande do Sul, 
(lot 3915), appears macroscopically to have well marked and rather 
distant annual rings, 2-4 mm distant. 
In the sections the ring-aspect seems for the most part to be due 
to concentric staining ; and annual rings, if such they he, are very 
poorly developed, narrow, and inconspicuous. 
The wood is gymnospermic and probably close to Dadoyylon me- 
ridionaleD. \V. Another fragment, from the same locality, con- 
sists mostly of white quartz, with spherolites. It has medullary, 
rays but one eellin width and very high, agreeing as to form and 
ray cells with Dadorylon Pedroi Zeill. The woodis infested with 
hacterioids, whieh in places are slightly brownish in the while 
matrix 
A fragment fvom 110 meters above the 8. Jeronymo coal near Sito 
Jeronvmo, has very numerous medullary rays which appear to be but 
one cell wide, and seldom over 12 cells high. The tracheid wall has 
bul one row of areoles, in which the pores seem to be round. 
The preservation in the slides examined does not permit of an 
identification of the species, without the preparation of additional se- 
ctions , but the wood is apparently allied lo that of Dadoxylon 
Pedro and Dadoxylon nunmularium. 
A portion of a small stem or branch from the horizon of the Iraty 
black shale near Tatuhy, S. Paulo, is interesting for the fact that, 
while the internal structure is almost totally masked by amorphous 
chalcedony, the peripheral zone presents, in one group, a fine illus- 
tration of tracheidal wall-thickening which appears in transverse 
section as isolated rings, thecell mem}ranes having been removed as 
the result of bacterial work. 
The presence of conifarous and Curdaitalean fossil woods in Rio 
Grande do Sul, and in Sao Paulo where they are associated wilh Psaro- 
nius, hasbeen noted by both Renault(1) and Zeiller(2) in connectian 
with the description of Lycopediopsis Derbyt and Dadoxylon Pedroi. 
(1) Bull. Soc. hist, nat. Antun, yol. Ili, p. 100. 
(2) Bull, Soc. geol, Fr., (3), vol, NX, p. 619. 
