. Animal forms; a second book of zoology. Zoology. ECI1IX0PERMS 14? has resulted in the production of a thin, cake-like form (Fig. 91). If the spherical body of a sea-urchin were to be stretched in the direction of a line joining the mouth and the center. Fig. -Basket-star {Astrophytori). One-half natural size. of the dorsal surface, a form resembling a sea-cucumber (Fig. 92) would be the result. These latter organisms live among crevices of the rocks, embedded in the mud or bur- rowing in the sand at the bottom of the sea. In such situa- tions they are well protected, and a highly developed s
. Animal forms; a second book of zoology. Zoology. ECI1IX0PERMS 14? has resulted in the production of a thin, cake-like form (Fig. 91). If the spherical body of a sea-urchin were to be stretched in the direction of a line joining the mouth and the center. Fig. -Basket-star {Astrophytori). One-half natural size. of the dorsal surface, a form resembling a sea-cucumber (Fig. 92) would be the result. These latter organisms live among crevices of the rocks, embedded in the mud or bur- rowing in the sand at the bottom of the sea. In such situa- tions they are well protected, and a highly developed skele- ton, such as that of the sea-urchin, would not only be of little value, but a positive hindrance to locomotion. The skeleton, therefore, is much reduced, consisting of a few scattered calcareous plates embedded in the fleshy body- wall. Another peculiar feature is almost universally pres- ent, in the form of a circlet of tentacles surrounding the mouth, which serve either for the purpose of respiration, for locomotion, or to convey food to the mouth. A very good imitation of the general plan of a sea-lily or crinoid (Fig. 93) could be made by attaching a serpent-. 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 Jordan, David Starr, 1851-1931; Heath, Harold, 1868- [from old catalog] joint author. New York, D. Appleton and company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
