253 



CCELEXTEEATA. 



Fam. Lucernaridae. Liicernaria 0. Fr. Miiller, Calycozoa with four radial 

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

 the digestive cavity alternating with these. L. quadricornis 0. Fr. Miiller, 

 campanulata Lmx. Crateroloj)hus Clark, with genital pouches and four 



chambers of the gastric cavity alterna- 

 ting with them. Cr. Leuckarti Tsehb. 

 = ltclgolandica 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 

 (Lobophora). 



Tetra-radiate Acalepha having a 

 four-sided pouch-like form. The 

 velum has a smooth margin, and 

 contains vessels prolongations of 

 the gastro-vascidar 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- 

 row partition walls. 



The Charybdew are distinguished 

 by the deep bell shape of their body, 

 and were formerly reckoned as 

 " Craspeclota " 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. 198. CharyMea marmpialis, natural Q n ^6 Other hand, the presence of 

 size. T, Tentacles ; Ek, marginal bodies . , 



(sense organs) ; Oo, ovaries. 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 



