National Geographic : 1939 Feb
THE NATIONAL GEOGRAPHIC MAGAZINE IN YELLOWSTONE PARK, A LOCAL WHOPPER MAY SNATCH YOUR LURE In streams and lakes throughout the park and adjacent regions is found the YELLOWSTONE TROUT (Salmo lewisi), one of the numerous species of cutthroat (Plate II). AN UNDERWATER ARCHITECT GUARDS HIS IGLOO-SIAPED NEST Tiny male TIIREE-SPINED STICKLEBACK (Gasterosteus aculeatus)builds a house of bits of roots and stalks of water plants. Cementing is done with a sticky substance secreted by special glands. Several females lay their eggs within the nest, each deposit being fertilized in turn by the finny polygamist.