If the animal is of larger size it will be most convenient to take it partially to pieces before or during the cleaning. The head may be separated from the neck, the vertebral column divided into two or more pieces, and the limbs detached from the trunk; but in no case should the small bones of the feet be separated from one another. The parts should then be treated as above described, and all packed together in a canvas bag. In the cetacea (porpoises, etc.), look for two small bones suspended in the flesh, just below the vertebral column, at the junction of the lumbar and caudal regions (marked externally by the anal aperture). They are the only rudiments of the pelvis, and should always be preserved with the skeleton. If there is no opportunity of preserving and transporting entire skeletons, the skulls alone may be kept. They should be treated as above described, picked nearly clean, the brain being scooped out through the _foramen magnum_, soaked for a few days in water, and dried. Every specimen should be carefully labelled with the popular name of the animal, if known, and at all events, with the sex, the _exact locality_ at which it was procured, and the _date_. For the purpose of making entire skeletons, select, if possible, adult animals; but the skulls of animals of all ages may be advantageously collected. Collectors of skins should always leave the skull intact. It should be taken out, labelled with a corresponding number to that on the skin, and dried with as much flesh on it as possible. _Reptiles and Fishes._—Full directions for preserving these will be found in the British Museum ‘Handbook,’ pp. 33-47. The following ‘hints’ were prepared by the late Mr. Osbert Salvin, F.R.S., who collected these animals most successfully in Guatemala:—