. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. Fig. 257. — Obelia, a group of campanularian hvdroid colonics. Nat. size. Photo, by W. H. C. P. Both tuliularian and campanularian hydroids may gi^'c rise to jellyfishes. These jellj-fishes are formed as buds on the hydranth, and after they be- come able to move of them- selves they are cut off from the parent and swim ; The jellyfishes then give rise to the S(>xual products and discharge them into the water (Fig. 260). As in this case the life-history of tlie animal consists of an attached ind
. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. Fig. 257. — Obelia, a group of campanularian hvdroid colonics. Nat. size. Photo, by W. H. C. P. Both tuliularian and campanularian hydroids may gi^'c rise to jellyfishes. These jellj-fishes are formed as buds on the hydranth, and after they be- come able to move of them- selves they are cut off from the parent and swim ; The jellyfishes then give rise to the S(>xual products and discharge them into the water (Fig. 260). As in this case the life-history of tlie animal consists of an attached individual alternating. Fig. 258. — Scrtularia, a small colony, nat. size. ' Derived from serta, garland. = Fig. 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
