674 REVIEWS AND BOOK NOTICES. 
Igarapé to Ereré crosses the bluff on the west. The beds com- 
posing the lower part of this bluff consist of a ‘‘ soft, well-lam- 
inated, fine-grained shale, dark gray in color, alternating with 
white or red layers, and consisting of a fine, more or less sandy 
silt, with an abundance of little flakes of mica.” One species of 
Discina and two of Lingula were obtained from the variegated 
shales. The former has been identified with a New York species, 
` Discina lodensis of Hall from the Genesee shale, and is very abun- 
dant. Above the shales is a heavy bed of red and white clay 
rock, containing only obscure markings, the whole haying a slight 
WOODED PLAINS 
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inclination to the southeast. In the northwestern part of the 
campo, Prof. Hartt.found, that “ the rock varies from a very ha 
dark-colored, silicious shale; to a well-bedded, dark-gray, compact, 
cherty rock, breaking with a conchoidal fracture.” These m 
the lowest beds of the series examined. Fragments only of pn 
were obtained from the more shaly portions. Following the 
Monte-Alegre trail eastward from the igarapé, light-colored pai 
with thin bands of a reddish sandstone, full of fossils, arè fo 
just before reaching the Monte-Alegre highlands. The 
belong to common Devonian genera. In a large ope? 
campo, to 
