A massive branching coral with very small calices; an important reef builder.
This is an illustration of a relatively flat island, surrounded by coral-reefs.
Coral in a fan like shape.
Coral in the shape of a tree.
Coral in the shape of a mushroom.
Reef coral with slightly enlarged calices.
These animalcule are so small that 1,000,000 are equal in bulk to only one cubic inch. They appear to…
This is an illustration of an island with an altitude of two thousand feet or more. It is surrounded…
An illustration of section of mine from the Kimberley Mine located in South Africa.
Greek ship with the sail reefed.