When studying the subject of exuviation, I was in the habit of keeping half a dozen or more specimens of the Edible Crab together as companions in the same vase; but except when a 'friend and brother' slipped off his shelly coat, and thus offered a temptation too great for crustaceous nature to withstand, I do not remember a single instance of cannibalism. True, there certainly were occasionally quarrelling and fighting, and serious nocturnal broils, whereby life and limb were endangered; but then such mishaps will frequently occur, even in the best regulated families of the higher animals, without these being denounced as a parcel of savages. Compared to _Cancer pagurus_, the Shore-Crab appears in a very unamiable light. When the two are kept in the same vase, they exhibit a true exemplification of the wolf and the lamb. This, much to my chagrin, was frequently made evident to me, but more particularly so on one occasion, when I was, from certain circumstances, compelled to place a specimen of each in unhappy companionship. Here is a brief account of how they behaved to each other: The poor little lamb (_C. pagurus_) was kept in a constant state of alarm by the attacks of her fellow-prisoner (_C. mænas_) from the first moment that I dropped her in the tank. If I gave her any food, and did not watch hard by until it was consumed, the whole meal would to a certainty be snatched away. Not content with his booty, the crabbie rascal of the shore would inflict a severe chastisement upon his rival in my favour, and not unfrequently attempt to wrench off an arm or a leg out of sheer wantonness. To end such a deplorable state of matters, I very unceremoniously took up wolf, and lopped off one of his large claws, and also one of his hind legs. By this means I stopped his rapid movements to and fro, and, moreover, deprived him somewhat of his power to grasp an object forcibly. In spite of his mutilations, he still exhibited the same antipathy to his companion, and, as far as possible, made her feel the weight of his jealous ire. Retributive justice, however, was hanging over his crustaceous head. The period arrived when nature compelled him to change his coat. In due time the mysterious operation was performed, and he stood forth a new creature, larger in size, handsomer in appearance, but for a few days weak, sickly, and defenceless. His back, legs, and every part of his body were of the consistency of bakers' dough. The lamb well knew her power, and though much smaller in size than her old enemy, she plucked up spirit and attacked him; nor did she desist until she had seemingly made him cry peccavi, and run for his life beneath the shelter of some friendly rock. Without wishing to pun, I may truly say the little partane came off with _eclat_, having my warmest approbation for her conduct, and a _claw_ in her arms as token of her prowess. I knew that when wolf was himself again there would be a scene. Reprisals, of course, would follow.