but they soon become impatient of captivity, and try to make off. The species of this genus (_pagurus_) are very numerous, and during the first part of their lives are all aquatic; that is, they are hatched in the little pools about the margin of the sea, and remain there until those that are destined to live on land are stout enough to commence their travels. The hermit-crabs, which are altogether aquatic, are by no means so careful to choose the lightest and thinnest shells, as the land troops. The aquatic soldiers may be seen towing along shells of the most disproportionate size; but their relatives, who travel over the hills by moonlight, know that all unnecessary incumbrance of weight should be avoided. They are as pugnacious and spiteful as any of the crustaceous class; and when taken, or when they fall and jar themselves considerably, utter a chirping noise, which is evidently an angry expression. They are ever ready to bite with their claws, and the pinch of the larger individuals is quite painful. It is said that, when they are changing their shells, for the sake of obtaining more commodious coverings, they frequently fight for possession, which may be true where two that have forsaken their old shells meet, or happen to make choice of the same vacant one. It is also said, that one crab is sometimes forced to give up the shell he is in, should a stronger chance to desire it. This, as I never saw it, I must continue to doubt; for I cannot imagine how the stronger could possibly accomplish his purpose, seeing that the occupant has nothing to do but keep close quarters. The invader would have no chance of seizing him to pull him out, nor could he do him any injury by biting upon the surface of his hard claws, the only part that would be exposed. If it be true that one can dispossess the other, it must be by some contrivance of which we are still ignorant. These soldier-crabs feed on a great variety of substances, scarcely refusing anything that is edible: like the family they belong to, they have a decided partiality for putrid meats, and the planters accuse them also of too great a fondness for the sugar-cane. Their excursions are altogether nocturnal: in the day-time they lie concealed very effectually in small holes, among stones, or any kind of rubbish, and are rarely taken notice of, even where hundreds are within a short distance of each other. The larger soldier-crabs are sometimes eaten by the blacks, but they are not much sought after even by them, as they are generally regarded with aversion and prejudice. There is no reason, that we are aware of, why they should not be as good as many other crabs, but they certainly are not equally esteemed. JOHN. No. IX.