. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 253 CCELENTEEATA. Fam. Lucernaridae. Lucernaria 0. Fr. Mliller, Calycozoa with four radial chambers ; without genital pouches, and without the accessory chambers of the distive cavity alternating with these. L. /jutulricor/tiit 0. Fr. Mtiller, camj>anulata Lmx. Craterolophus Clark, with genital pouches and four chambers of the gastric cavity alterna- ting with them. Or. LrurJutrti Tschb. = lielgolandica Lkt., Heligoland. The Lucernaria are without exception marine animals, and are remark
. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 253 CCELENTEEATA. Fam. Lucernaridae. Lucernaria 0. Fr. Mliller, Calycozoa with four radial chambers ; without genital pouches, and without the accessory chambers of the distive cavity alternating with these. L. /jutulricor/tiit 0. Fr. Mtiller, camj>anulata Lmx. Craterolophus Clark, with genital pouches and four chambers of the gastric cavity alterna- ting with them. Or. LrurJutrti Tschb. = lielgolandica Lkt., Heligoland. The Lucernaria are without exception marine animals, and are remarkable for their great reproductive power. Accord- ing to A. Meyer, if the stalk be cut off, the cup reproduces a new one, and injured individuals, and even excised pieces, can become perfect animals. (2) Sub-order : Marsupialida. Tetra-radiate Acalepha having a four-sided pouch-like form. The •velum has a smooth margin, and contains vessels prolongations of the gastro-vascidar system]. On the margin of the disc there are four vertically placed lobe-like appen- dages. There are four covered sense organs, and the same number of vascular pouches separated by nar- row partition walls. The Charybdece are distinguished by the deep bell shape of their body, and were formerly reckoned as " Craspedota " among the Hydro- medusce, with which they certainly have some characteristics in com- mon. Amongst these character- istics the most striking is the possession of a smooth-edged velum. which, however, contains vessels. Qn the other hand, the presence of the gastric filaments and ot the large sense organs enclosed in niches points to a relationship with the Acalepha ; and this view is supported by the character of their whole structure, in which the peculiarities of the Lucernaridce are perceptible, though greatly FIG. 198.— CJiai-i/bdea miirnipiaiis, natural size. T, Tentacles; RTc, marginal bodies (sense organs) ; Oo, Please note that these images are extracted fro
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