Other small shells, ½ to ¾ of an inch in diameter, may be put into pill-boxes at once, for in a dry climate they very soon dry up. The very large animals may be removed by boiling them in water, but when time does not admit of attending to the cleaning of the shells, species, such as Unios, may be put into empty soup-tins and then filled up with dry sand. It is very important to make a few notes on the colour of the animal, attaching a number for reference on the box or in the tube, and the operculum, when present, should always be preserved. With respect to slugs, note the surface of the mantle, and always the form of the extremity of the foot, whether pointed or provided with a mucous pore; and again the lobes of the mantle. Preserve them in spirits as above. Drawings from the living animal are invaluable, and should be made if possible. Very little is known of the Asiatic forms; they are of much interest, and have been very little collected. _Insects._—For the best means of preserving the various orders of insects the traveller should consult the ‘British Museum Handbook,’ pp. 48-89. _Botanical Collecting._—Full instructions will be found in the ‘British Museum Handbook,’ pp. 116-125. The following instructions have been prepared by the late Mr. J. Ball, F.R.S.:— To obtain good specimens of dried plants in a condition serviceable to scientific men, the following are the chief points to be observed:— 1. _Selection of Specimens._—The object is to give as much information as possible respecting the plant which it is intended to collect. Small plants not exceeding 16 inches in height should be collected _entire with the roots_. Slender plants of greater dimensions may be folded to the same length, and may often be collected entire. Of larger plants, shrubs and trees, the object is to show as much as possible of the plant within the limit of the size of your drying paper. As an universal rule, both the flower and fruit (seed-vessel) should, if possible, be preserved. Of those plants whereon the male and female flowers grow separately, specimens of both should, if possible, be collected. 2. _Conveyance of Specimens to Camp or Station._—Tin boxes made for the purpose are generally used in Europe for carrying botanical specimens until they can be placed in the drying press. They answer sufficiently well in cool weather, but in hot countries specimens are often partly withered before they can be laid out; and a rough portfolio, into which the plants can be put when (or soon after) they are gathered, is much to be preferred.