40 Phosphate Rocks of South Carohna, 
' Forests,” suggested to us the same thing, viz: the im- 
bibition of the juices from fecal matter, deposited by 
land quadrupeds, above the nodular rocks. 
Bird guanos invariably contain bird-bones and small 
fish-bones; and frequently entire skeletons of birds 
partly fossilized, are found in Peruvian Guanos. The 
Sombrero, and other West Indian and Caribbean 
varieties, are undoubtedly accumulations of the excre- 
ment of birds. 
No bones of birds have been discovered in the 
Phosphate-rock Basins, and but two or three unchar- 
acteristic fragments, swpposed to belong to birds, have 
been found in the clay beds of this age; we feel war- 
ranted therefore in asserting that this is not the result 
of bird excrements. 
The English beds of Phosphate-rocks, lately discov- 
ered, resembled in almost every particular those of 
the Ashley Basin. 
Professor Ansted describes them as “containing 
numerous fossil remains of animals,’ and they cor- 
respond in a remarkable degree in geological posi- 
tion, being “all along the outcrop of the Green-sand 
beds on the south coast of England,” the Carolina 
Phosphate-rocks, are also “ail along” the outcrop 
of the Eocene Marl, the Green-sand bearing bed 
of South Carolina. 
The amount of Phosphate of Lime and Carbonate 
of Lime is much the same in both, that is from 55 to 
60 per cent. of the former, and 5 to 10 per cent. of the 
latter. The nodules are about the same size and form, 
both in the English and American beds; both are 
deposited in basins and the strata are not continuous. 
