. The fur seals and fur-seal islands of the North Pacific ocean. Sealing; Seals (Animals). /r >"'.£:;: Length, 45 mm. smaller. Color, greenish brown. Zooids.—Large and numerous, though scarcely visible on the surface of the preserved colonies. The irregular systems contain numerous zooids, many of which are quite distant from the broad but inconspicuous atrial orifice common to the system. Positions approximately perpendicular to the surface of the colony. (Pig. 14 Z.) Body distinctly separated into three regions, viz, thorax, abdomen, and postabdomen. (Fig. 15.) Measurements of the zo
. The fur seals and fur-seal islands of the North Pacific ocean. Sealing; Seals (Animals). /r >"'.£:;: Length, 45 mm. smaller. Color, greenish brown. Zooids.—Large and numerous, though scarcely visible on the surface of the preserved colonies. The irregular systems contain numerous zooids, many of which are quite distant from the broad but inconspicuous atrial orifice common to the system. Positions approximately perpendicular to the surface of the colony. (Pig. 14 Z.) Body distinctly separated into three regions, viz, thorax, abdomen, and postabdomen. (Fig. 15.) Measurements of the zooids: Total length, 10 mm.; length of thorax, 4 mm.; length of postabdomen and abdomen, 6 mm. Test.—Small in quantity among the zooids, so close are these to one another; but a considerable mass in the middle of the colony in which no zooids occur. (Fig. 14.) Surface layer considerably denser and darker in color than the deeper portions, a few scattered sand grains embedded on the sur- face. The inner mass containing no zooids, rather firm in character; opaque white, contains many small cells, but no bladder cells; penetrated by the stolonic vessels of the zooids, though these are not numerous, A few scattered stellate crystals present. Mantle.—Yery thin, containing a few muscle fibers, mostly running lengthwise of the body; some circular fibers at the anterior end of the thorax encircling the siphons. Branchial apparatus.—Branchial orifices indistinctly seen on the surface of the. 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 United States. Dept. of the Treasury. Commission on Fur-Seal Investigations; Jordan, David Starr, 1851-1931; Stejneger, Leonhard, 1851-1943; Lucas, Frederic A. (Frederic Augustus), 1852-1929; Moser, Jefferson F; Townsend, Charles Haskins, 1859-; Clark, George Archibald, 1864
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherwashingtongovtprin
