. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. 176 ZOOLOGY 'prob rean. nat. size. Leunis. >h'-,ct In conclusion brief mention must be made of certain worm- like animals still more distantly related to the earthworm. The first of these is marine, but has the same slow-moving, burrowing hal^its as the earthworm. These animals have become more modified in connection with their burrowing habits than the earthworm, for thej' have lost not only their appendages, but in the adult stage even the segmentation of the body. This is the class Gephyrea.^ This gro
. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. 176 ZOOLOGY 'prob rean. nat. size. Leunis. >h'-,ct In conclusion brief mention must be made of certain worm- like animals still more distantly related to the earthworm. The first of these is marine, but has the same slow-moving, burrowing hal^its as the earthworm. These animals have become more modified in connection with their burrowing habits than the earthworm, for thej' have lost not only their appendages, but in the adult stage even the segmentation of the body. This is the class Gephyrea.^ This group con- tains se^'eral rather rare animals, some of Fig. 166. — Phasco- which are edible, and „ , ^, are held in esteem by < )!ic-foiirth -^ From the Chinese. One of the commonest is Phascolosoma,^ which is a tougli but smooth-skinned, cigar-shaped worm, which one can dig up on our sandy sea- beaches (Fig. 166). One end is pointed; from the other a great proljoscis ending in tentacles surrounding a mouth can ha extruded. Another species found on our beaches after a storm, something like a small cucumber in shape and size, has a row of bristles at each end, indicat- ing its relationship with the bristle- bearing worms. This striking species, ' (FPMjra, bridge ; lipcause they were once to bridge the gap between holothu-. posrsct rians and worms. ^ phaskoluv, sue ; soma, body. Fig. 167. — Echiurus. About one-half nat. size. proJi, proboscis ; ant. set, anterior seta? ; post, set, posterior set:e. .Vfter Greef, from Parker and Haswell's Text- Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Davenport, Charles Benedict, 1866-1944; Davenport, Gertrude Anna Crotty, 1866- joint author. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1911
