forms, the whole of the selection and grouping of the collections being subordinated entirely to securing a representation, as nearly normal as possible, under the limitation of space and conditions of the material, of the characteristic assemblages of marine animals and plants. Numerous tanks of considerable size contain displays of faunal types, in alcohol or formalin, in natural groupings and environmental effects. Dried collections and the taxidermist's art are also used in larger exhibits, as, for example, in a most excellent portrayal of a coral reef from the Red Sea. Ten small "alcoholaria" give vivid pictures with much of the original color preserved, of the minor types of faunal assemblages about a coral reef, such as the sea urchins and sea roses (Crambactis) with symbiotic fish (Amphiprion); giant mussels (Tridacna), corals and parrot fish; the madrepore area; the rock fauna; the regions of dying and of dead corals and the plant life of coral reefs. In like spirit and perfection of technique are displayed the fauna of the Antarctic icebergs, the sponge beds of the Ægean Sea, the fishing grounds off Helgoland, the pelagic world, the sandy grounds, the rock pools, oyster beds, limestone cliffs and the fishing banks of the North Sea.
The ecological interrelations of the marine fauna are suggested by exhibits of the food of well-known fish. The economic values and uses of the products of the sea are concretely illustrated in striking manner by transparencies, and by exhibits of the crude materials and various
