GUANO, the accumulated dung of sea-birds, found on many islands. The white layer of the first year is considered the best. A variety of guano found in the limestone caves on the Tenas serim coast is much used as a manure by European and Chinese planters in Pinang and Province Wellesley. M. A. Ramonde, Professor of Natural History at Lima, was sent in 1853 by the Peruvian Government to the Chincha Island& In some places he found the guano deposit 30 metres in depth. From the bodies of animals as well as from various manufactured articles found in it, he concluded that the deposit belongs to the present epoch of the earth's history. The birds observed during his visit were—Pelecanus majus, ; Carbo Gaimardii, Lesson ; C. albigula, Brandt ; Sula variegata, Tschudi ; Spheniscus Ilumboldtii,./Weyen ; Plotus milting, Linn. ; Rhyn cops nigra, Lenz. ; Larne rnodestus, Tschudi ; Puffinaria Garnotii, Lesson ; Sterna inca, Lesson. Soule of them only appear at the breeding seasons.
The pelicans do not seem to produce much guano, as they almost always inhabit the cliffs, and their excrement falls into the ocean. The same may be said of the species of Carbo. The species of Sula contribute more to the deposit, their number being greater, and their habitations being more in the interior of the island& The species of Plotus and Rhyncops are very rare, those of Lams more numerous. The Sterna only visit the islands to lay their eggs, but their num bers aro so very great that they must contribute in a great measure to the formation of guano. The Spheniscus abounds in the southern island, which is inhabited. These birds not being able to fly, hollow out habitations for themselves in the guano. The birds which produce the largest quantity of guano are the Puffinaria ; their number is incalculable. — L. Institut. May 1856 ; Ed. New. Phil'. .1-020'. November 1856.