A genus of mollusks with light horn colored shells, and inhabiting the cold waters of the Arctic seas, is the Buccinum, or whelk. In various parts of Great Britain it is known as “buckie” and “mutlog.” The Buccinum delights to burrow in the sand, like the moon shells (Natica), and frequently nothing but the end of the siphon can be seen, the latter protruding from the sand to enable the water to enter the animal to furnish the necessary oxygen. The whelk is used economically, both for food and bait. One ingenious method of catching them is to fasten a dead fish of good size in a wire basket and to allow it to rest on the bottom for a short time; when taken up it is covered with large, fat whelks. This fishery in Great Britain is fully as valuable as our oyster fishery, the annual income from this industry reaching to thousands of pounds sterling. The animal is also one of the principal baits used in cod fishing. A related genus, the neptune shells (Neptunea), is also eaten by the poorer people and makes a good codfish bait. The two kinds of whelk (Buccinum and Neptunea), are termed, the first the white whelk and the second the red or almond whelk, probably on account of the colors of the two shells. In the Shetland Islands the red whelk is used as a lamp, being suspended by strings from a nail, the mouth placed uppermost and filled with oil. [Illustration: ] First row: Cypraea pantherina (Red Sea) Cassis flammea (Bahamas) Conus marmoreus (Polynesia) Second row: Buccinum undatum (U. S.) Fasciolaria distans (U. S.) Third row: Tritonium olearium (Naples) Oliva irisaus (Amboina) Voluta musica (West Indies) Fourth row: Ianthina communis (Atlantic Ocean) Chiton squamosus (Jamaica) Lottia gigantea (California) Nassa glans (Amboina) The basket shells or dog-whelks are among the most numerous in individuals of all the marine snail shells, the common black whelk (Nassa obsoleta) being the most common of all the mollusks. The writer has seen a mud flat at low water literally paved with the shells of this snail, there being millions of the little creatures crawling about. The shells of this family are frequently very handsome, being latticed by the crossing of lateral and longitudinal lines. They are mostly of small size, scarcely exceeding an inch in length, many of them being much under these dimensions. The animal is very rapid in movement and leaves a distinct track in the mud, which will frequently end at a little pellet of mud, which, upon examination, will disclose the little animal nicely concealed beneath.