Dwellers of the sea and shore . dwellersofseasho00crow Year: 1935 214 Dwellers of the Sea and Shore Another instance wherein the gills serve the double purpose of supplying the animal with oxygen and food, but in a manner considerably different, Is In the blood worm {Polxcirrus eximius). It is a segmented worm, deep crimson in color, and adorning its head is a crown of crowded tentacles, or gills, composed of transparent serpula; a tube-building worm, this creature has built its tube on the dead shell of a whelk. filamentous strands that are continuously contracting and expanding. These ca
Dwellers of the sea and shore . dwellersofseasho00crow Year: 1935 214 Dwellers of the Sea and Shore Another instance wherein the gills serve the double purpose of supplying the animal with oxygen and food, but in a manner considerably different, Is In the blood worm {Polxcirrus eximius). It is a segmented worm, deep crimson in color, and adorning its head is a crown of crowded tentacles, or gills, composed of transparent serpula; a tube-building worm, this creature has built its tube on the dead shell of a whelk. filamentous strands that are continuously contracting and expanding. These can be extended to several times the length of the animal's body, the latter being about three inches long. A pair of shorter, branched gills also occur on each segment of the forward half of the worm, while the hinder part is bare. In this creature, as well as many others of Its class, the typical crown of appendages that they bear may with equal correctness
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