258 



CCELENTERATA. 



Fam. Lucernaridae. Lucernaria 0. Fr. M tiller, Calycozoa with four radial 

 chambers ; without genital pouches, and without the accessory chambers of 

 the digestive cavity alternating with these. L. qun/J ricunt/.t 0. Fr. Miiller. 

 campanulata Lmx. Crater olo^lnix Clark, with genital pouches and four 



chambers of the gastric cavity alterna- 

 ting with them. Cr. Li-ni-ltarti Tschb. 

 lielgolandica Lkt. , Heligoland. 



The Lucaniar'ni 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 



(Lobophora}. 



Tetra-radiate Acalepha having a 

 four-sided pouch-like form. The 

 velum has a smooth margin, and 

 contains vessels prolongations of 

 the gastro-vascular systeni\. 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- 

 roio partition ivalls. 



The Charybdei? 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. 

 FIG. \w.-d,aryide<i m a n ,iaih, natural Qn the other hand, the presence of 



size. T, Tentacles ; Kk, marginal bodies . 



(sense organs) ; Ov, ovaries. the gastric filaments and of 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 Lucernaridw are perceptible, though greatly 



