. Zoölogy [microform] : descriptive and practical. Zoology; Zoologie. Echinodermata. 339 name of sea eggs. In a cleaned shell, or corona, as it is sometimes called, there are found ten double rows of caN careous plates, making twenty in all. Every alternate double row is closely perforated for the passage of the tube feet These perforated plates are called the ambu-. Fig. 191. Sea Urchin. The heavy pro}ectioni are the spines; the long, slender ones ate the tube feet. lacral plates. Both the ambulacral and the interambula- cral plates bear rounded elevations, on which the spines were borne. Eac
. Zoölogy [microform] : descriptive and practical. Zoology; Zoologie. Echinodermata. 339 name of sea eggs. In a cleaned shell, or corona, as it is sometimes called, there are found ten double rows of caN careous plates, making twenty in all. Every alternate double row is closely perforated for the passage of the tube feet These perforated plates are called the ambu-. Fig. 191. Sea Urchin. The heavy pro}ectioni are the spines; the long, slender ones ate the tube feet. lacral plates. Both the ambulacral and the interambula- cral plates bear rounded elevations, on which the spines were borne. Each spine has a hollow in its base, which fits over an elevation on the shell, making a ball-and-socket. 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 Colton, Buel P. (Buel Preston), 1852-1906. Toronto : Copp, Clark
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1903
