The microscope and its revelations . around the stomach; which are occupied by plaited mem-branous ribands, containing sperm-cells in the male, and ovain the female; and the embryoes evolved from the latter,when they have been fertilized by the agency of the former,repeat the extraordinary cycle of phenomena which has beennow described. 308. In connection mth the preceding, it will be convenientto mention two curious little marine animals of frequentoccurrence, the true place of which in the scale it seems diffi-cult to determine, but which, having the free swimminghabits and the soft texture
The microscope and its revelations . around the stomach; which are occupied by plaited mem-branous ribands, containing sperm-cells in the male, and ovain the female; and the embryoes evolved from the latter,when they have been fertilized by the agency of the former,repeat the extraordinary cycle of phenomena which has beennow described. 308. In connection mth the preceding, it will be convenientto mention two curious little marine animals of frequentoccurrence, the true place of which in the scale it seems diffi-cult to determine, but which, having the free swimminghabits and the soft texture of the Medusse., have been verycommonly ranked as members of the same class. One of ACALEPELffi :—CYDIPPE AND BEROE . 545 these is the Ci/dippe pileus (Eig. 228, a) very commonly knownas the Beroe, which designation, however, properly appertainsto another animal (b) of the same grade of body of Ci/dippe is a nearly-globular mass of soft jelly,usually about 3-8ths of an inch in diameter; and it may be Fi&. A, Cydippe pileus with its tentacles extended,—B, JBeroe Fm-shalii, showing-the tubular prolongations of the stomach. observed, even with the naked eye, to be marked by eightbright bands, which proceedfrom pole to pole like bands are seen with the microscope to be formed ofrows of large cilia, which are in a state of pretty-constantvibration, though sometimes they are at rest; and if the sun-light should fall upon them when they are in activity, theydisplay very beautiful iridescent colours. The mouth of theanimal, situated at one of the poles, leads to a stomachalcavity of cylindrical shape, which extends about as far as thecentre of the body, and then narrows into an intestinal tubewhich terminates at the opposite pole; from this stomachtubular prolongations pass-off beneath the ciliated bands, verymuch as in the true Beroe (b). In addition to the rows ofcUia, the Cydippe is furnished with a pair of locomotive organsof a very p
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Keywords: ., bookcentury1800, booksubjectmicroscopes, booksubjectmicroscopy
