Others were found 
washed upon the beaches, 
but much broken and worn. 
The millepores are uncom- 
mon, and the specimens 
obtained are poor and gen- 
erally worn. None of the 
corals growing about the 
Shores of Fernando are 
abundant, and the speci- 
mens are very poor ав com- 
pared with those growing 
along the Pernambuco and 
Alagóas coast reefs. 
There are certain calca- 
reous growths about the 
Shores of Fernando de No- 
ronha that are worthy of 
Mention, These are formed 
by Serpulae, corallines, and 
other lime-secreting organ- 
isms growing upon volcanic 
rocks in place, and building 
up stony, calcareous rings 
that enclose terraced basins 
of various sizes. 
The accompanying sketch 
is of one of the large nests 
of diminutive basins to the 
east of Morro Francez. In 
general appearance these 
basins resomble the traver- 
tine deposits of Gardner’s 
River in the Yellowstone 
National Park. The pools 
are full of animal life, and 
the water is constantly re- 
newed by thé waves break- 
ing over the rocks. 
Similar deposits about a 
mile long grow upon the 
rocks along the southern 
Coast of the island in front 
Ley ee Ела 
Calcareous terraces, north side of the island of Fernando de Noronha. 
Fig. 96. 
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