. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . idity; they takegraceful curves as the animal moves rapidly through the water. Pleurobrachia has a pink tint, and prismatic colors play over it from the vibrating cilia. It is a beautiful and interesting creature to watch. Found along the shores of Massachusetts and Maine. ORDER LOBATAGENUS Bolina B. alata. Slightly oval in form; lowerpart of the body divided into two large lobeswhich hang below the mouth. Four of theswimming-plates are shorter than the otherfour and terminate
. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . idity; they takegraceful curves as the animal moves rapidly through the water. Pleurobrachia has a pink tint, and prismatic colors play over it from the vibrating cilia. It is a beautiful and interesting creature to watch. Found along the shores of Massachusetts and Maine. ORDER LOBATAGENUS Bolina B. alata. Slightly oval in form; lowerpart of the body divided into two large lobeswhich hang below the mouth. Four of theswimming-plates are shorter than the otherfour and terminate in curious processes orshort appendages called auricles. Bolina isabout two inches in length, and is verydelicate, transparent, and contractile power enables it to vary inoutline to a considerable extent. It has aslow undulating motion, and sometimescarries its lobes uppermost and open. Usu-ally found associated with Pleurobrachia from Massachusetts northward. B. septentrionalis. Found on the northern Pacific coast. B. vitrea. A species found in. Florida. Jlrurobrachia rhododactyla, in Bolina alata, seen from the broadside: o, eye-speck ; m, mouth ; r, au-ricles ; v, digestive cavity ; g, h, shortrows of flappers; a, f, long rows offlappers ; b, n, x, t, z, tubes winding inthe larger lobes; i, base of half natural size. COMB-JELLIESGENUS Mnemiopais 157 M. Leidyii. Resembles Bolina in general form; often six to eightinches in length; gregarious, thousands often being collected together;exceedingly phosphorescent. ORDER CESTIDAGENUS Cestum, C. veneris, Venuss girdle. This singular animal, although not aninhabitant of our seas, has its place in this group, and is shown herebecause of its very curious shape. In form it is flat and it attains a length of five feet, while in breadth it is but oneor two inches. The mouth is midway in its length and is opposite thesense-organ or eye-spot. On each side of the mouth is a sho
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmarinea, bookyear1901
