There is, however, nothing on the mainland of Devonshire to compare in ornithological interest with Lundy, which in the summer time is a bird-lover's paradise. Gannets, once very numerous, have now left the island, but cormorants, shags and gulls of various species here build their untidy nests. Here multitudes of guillemots and razorbills assemble in the spring and lay their great pear-shaped and boldly-marked eggs on the ledges of the cliffs; while even vaster hosts of puffins come back every year to take up their quarters in rabbit-burrows or in holes which they have dug for themselves in the turf. Here the raven, the buzzard, and the peregrine have fastnesses. Here, in chinks and crannies, storm-petrels breed; and here, when darkness falls, the startled listener may hear the weird, wailing cry of the night-wandering shearwaters. The few reptiles and batrachians of Devonshire present no points of special interest. Vipers abound on Dartmoor, where they are commoner than grass-snakes. It is curious that, while the palmated newt is common throughout the county, the smooth newt and the triton are now comparatively rare. The freshwater fish differ little from those found in the neighbouring counties; but there are fewer kinds in Devonshire than there are in the midlands or in the east of England. Trout abound in all the streams, and there are important salmon-fisheries on the Exe, the Dart, and other rivers. A sturgeon seven-and-a-half feet long was once taken in the Exe. Eels, which are hatched in the Atlantic, to the west and north of the British Islands, at a depth of 3000 feet or more, come up from the sea when they are two years old, and still very small, and ascend the rivers, especially Exe, in enormous numbers. When they are mature, which is not until they are several years old, they go down to the sea to spawn, and never return. It is, however, in marine zoology, for which few other parts of England afford so rich a field, and for which its bays and inlets, its rock-pools and stretches of sand provide ideal hunting-ground for the naturalist, that Devonshire is most distinguished. Many famous zoologists, such as Leach, Montagu, Parfitt, Gosse, and Kingsley have won renown both for themselves and for the county by their researches; while the Marine Biological Laboratory at Plymouth is constantly adding to our knowledge of the multitudinous inhabitants of the sea. The subject is so vast that only a few chief points can here be touched upon.