P. ruber, entirely light vermilion, extends from Florida to Para and the Galapagos; P. chilensis s.
If their ancestors had been carried out to sea once or twice by a flood and safely drifted as far as the Galapagos Islands" (Wallace), "they must have been numerous on the continent" (Rothschild and Hartert).
The Galapagos Islands belong to the republic of Ecuador, and form a part of the province of Guayas.
The Galapagos Islands were declared a dependency of the province of Guayas in 1885, but are practically independent and constitute a second territory under the administration of a jefe territorial appointed by the national executive.
Diatom ooze has been found in detached areas between the Philippine and Mariana islands, and near the Aleutian and Galapagos groups, forming an exception to the general rule of its occurrence only in high latitudes.
