A mollusk whose shell is cast upon the shore by thousands, but the animal of which is very rare, is the Spirula. The shell is less than an inch in diameter, is made in the form of a loose spiral and is divided into little chambers connected by a siphuncle. The shell of this genus does not contain the animal, as in Nautilus, but it is enveloped in two flaps of the mantle, at the posterior part of the animal, the shell being concealed with the exception of a part of the edge on each side. The body of the animal is long and cylindrical and the arms are quite short, more nearly resembling those of the Nautilus than those of the Octopus or squid. The body ends in a disk which is supposed to be a kind of sucker, by which the animal can adhere to rocks, thus enabling it to freely use its arms in obtaining food. It has been supposed by some anatomists that the shells of the fossil Ammonites were attached to the animal in a similar manner, and if this should be true these small mollusks would assume a new meaning as being the last survivors of a large group of animals of which all except Spirula are extinct. Probably the best known of the shell-less cephalopods is the octopus, with its rounded body, large eyes and long arms. Almost everybody has read Victor Hugo’s weird account of the octopus in his “Toilers of the Sea,” and the animal has thus been rendered more or less familiar, although it was made to do several things by the author that it would not do in nature, as, for example, “drinking” a man alive. The Octopus is found abundantly throughout temperate and tropical seas, generally on the coast among rocks, but frequently on the sandy bottom in water of moderate depth. Here it may occasionally be seen “walking” clumsily along on its eight long arms, its little round body being balanced above the arms. Its favorite position, however, is among the rocks. In such a locality it will squeeze its body into some crevice and spread out its arms until they form a sort of web, resembling in this position a huge spider waiting for its prey. And it may well be likened to a spider for from this web there is no escape if once a hapless fish has come in contact with the powerful suckers on the long arms. The poor fish is paralyzed when seized by the octopus and is drawn towards the mouth, where it is torn to pieces by the beak-like jaws, and swallowed.