. Elementary text-book of zoology. Zoology. CEPHALOPODA. G7 especially Crustacea. Some of them attain a great size. The flesh is Br. ^- eaten, and the colouring matter of the ink-sac (sepia) and the 7r. / dorsal shell (os sepice] are used \^ \ by man. The remains of Cepha- lopods occur in all formations from the oldest Silurian and constitute important charac- teristic fossils (Belcmnites, Am- monites). Order 1.—TETRABRANCHIATA.* Cephalopoda with four (/ills in the mantle cavity and nu- merous retractile Ds~ tentacles on the head, with split funnel and many- chambered shell. The append- ages o
. Elementary text-book of zoology. Zoology. CEPHALOPODA. G7 especially Crustacea. Some of them attain a great size. The flesh is Br. ^- eaten, and the colouring matter of the ink-sac (sepia) and the 7r. / dorsal shell (os sepice] are used \^ \ by man. The remains of Cepha- lopods occur in all formations from the oldest Silurian and constitute important charac- teristic fossils (Belcmnites, Am- monites). Order 1.—TETRABRANCHIATA.* Cephalopoda with four (/ills in the mantle cavity and nu- merous retractile Ds~ tentacles on the head, with split funnel and many- chambered shell. The append- ages of the head are peculiar. In place of the arms there are a num- ber of filiform tentacles round the mouth. In Nautilus there are on each side • of the body (a) nineteen ex- ternal tentacles, of which the dorsal pair constitutes a kind of hood which can close the orifice of the shell; (lj) two ocular tentacles on each side near 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 Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. New York : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
