Much commoner, at least in the London market, than the species of _Leander_ is _Pandalus montagui_, often sold under the general name of Prawn, but sometimes called the "Pink Shrimp." This resembles _Leander serratus_ in having a long, serrated, up-curved rostrum, but differs from it strikingly in the form of the anterior pairs of feet. The first pair appear to the naked eye to have no pincer-claws, but to end in a sharp point, resembling the third maxillipeds, which are just in front of them. As a matter of fact, they do have pincers, but so minute that they can only be detected by microscopic examination. The feet of the second pair are unequal in length on the two sides, that on the left side being the longer, and are very slender. They end in small pincers, and examination with a pocket-lens will show that the carpus, or "wrist," and the segment below it (merus) are broken up into a large number of short segments, so that the limb is extremely flexible. When alive, the animal is even more handsomely marked than the Common Prawn. [Illustration: FIG. 79--THE NORWEGIAN DEEP-WATER PRAWN (_Pandalus borealis_), FEMALE. (After Sars.) The second leg of the right side is indicated by dotted lines.] A large species of Prawn is now imported to this country in considerable quantities from Norway. This is _Pandalus borealis_ (Fig. 79), a species closely allied to the last-named, but differing in the longer and more slender rostrum and in many other characters, as well as in its larger size (specimens have been recorded of 6 inches in total length). It also differs in its habitat, for while _P. montagui_ lives in shallow water, or even between tide-marks, _P. borealis_ occurs at depths of 30 to 60 fathoms in the Norwegian fjords. The recent development of the fishery for _P. borealis_ in Norway is a striking example of the practical value of zoological research. Until 1898 the species was hardly known except to zoologists, although a small fishery was carried on in the Drammen Fjord, near Christiania. The investigations of the naturalists employed by the Norwegian Department of Fisheries showed that the species existed in vast numbers in the deeper water of many of the fjords, and that it could be captured in abundance by means of a suitably-devised trawl-net. As a result, a very profitable fishery was established, and the "deep-water Prawns" are now not only largely consumed in Norway, but are exported in increasing quantities to the English and other markets. In the warmer seas the large Prawns of the genus _Penæus_ are of considerable importance. Thus, in the Mediterranean countries, _Penæus caramote_ (Plate IV.) is highly esteemed for food, and _P. setifer_ and _P. brasiliensis_ are largely consumed in the Southern United States. _P. monodon_ and other species are eaten in India. An attempt has been made to send a species of the same genus (apparently _P. indicus_) in a frozen state from Queensland to the London market.