. Birds of other lands, reptiles, fishes, jointed animals and lower forms;. Zoology; Birds; Reptiles; Fishes. 356 THE LIVING ANIMALS OF THE WORLD. A comparatively small number of these moss-animals are inhabitants of fresh-water, forming brown tubular aggre- gations on the under side of the leaves of water-lilies or other submerged objects. It is interesting to observe that the tentacular crown in almost all these fresh-water species is horseshoe-shaped, instead of like a shuttle-cock, as in the marine forms. One very not- able fresh-water species is re- markable for the circumstance that in p
. Birds of other lands, reptiles, fishes, jointed animals and lower forms;. Zoology; Birds; Reptiles; Fishes. 356 THE LIVING ANIMALS OF THE WORLD. A comparatively small number of these moss-animals are inhabitants of fresh-water, forming brown tubular aggre- gations on the under side of the leaves of water-lilies or other submerged objects. It is interesting to observe that the tentacular crown in almost all these fresh-water species is horseshoe-shaped, instead of like a shuttle-cock, as in the marine forms. One very not- able fresh-water species is re- markable for the circumstance that in place of horny tubes the component individuals secrete a common transparent gelatinous matrix, which is provided with a creeping-base, wherewith the colony-stock is enabled to travel over the surfaces of the water-plants among which it lives, or up the glass sides of an aquarium. In some respects, and more especially their earlier developmental phases, the Moss-animals show affinities with the Lamp-shells, while the tentacular crown of the adult individual is closely imitated in certain worms. fhtto by IV. Savilh-Kcnt, '^ IMilford-in-Sia MOSS-ANIMALS Tftetc ccral-likc maizes are composed of manf thousand closely united diveUing cells of microscopic dimensions CHAPTER V WORMS THE Worms and their allies embrace a numerous assemblage of animals which exhibit a remarkable amount of variation both in structure and habits. A fundamental distinction which serves to separate readily even the most highly organised members of the group from the other articulate or jointed-bodied animals, such as Crabs, Insects, or Centipedes, is furnished by the character of the locomotive appendages. These in the Worm Tribe never assume a jointed character, but take the form of unjointed membranous processes which may or may not be supplemented by bristles. Frequently bristles alone constitute the essential locomotive organs. In certain groups, such as the Leeches, Flat-worms, Thread-worms, and oth
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