. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . Lepas anatifera. A, the entire animal; B, anatomy, a, autennule; c, carina; cd,cement-gland ; I, digestive gland ; m, adductor muscle ; oil, oviduct; ov, ovary; p, ped-uncle ; s, scutum; t, tergum and testis ; vd, vas defereus; ft, tentacles. GENUS Balanus Balanns is known as the acorn-shell, or sea-acorn, and isfound in vast numbers and of all sizes between tide-marks,incrusting rocks and the piles of piers. It also may be foundattached to floating objects or to shells, or ev
. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . Lepas anatifera. A, the entire animal; B, anatomy, a, autennule; c, carina; cd,cement-gland ; I, digestive gland ; m, adductor muscle ; oil, oviduct; ov, ovary; p, ped-uncle ; s, scutum; t, tergum and testis ; vd, vas defereus; ft, tentacles. GENUS Balanus Balanns is known as the acorn-shell, or sea-acorn, and isfound in vast numbers and of all sizes between tide-marks,incrusting rocks and the piles of piers. It also may be foundattached to floating objects or to shells, or even to living animals,but its usual habitat is stationary. Unlike Lepas, it has no stalk,the shell being directly attached to some object. The body issurrounded by a fold of skin, to which are attached a shell con-sisting of six or more plates and a fourfold lid, or operailum,consisting of two scuta and two terga. The operculum may becalled the door, as the animal opens and shuts it at will andhas complete protection when it is closed. If one taps a rock.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmarinea, bookyear1901
