Chap. VI. TABULAR VIEW. 2^3 



))ot\veen which hang long tentacles. Judging from the fig- 

 ures of Mertens, which give the only available information 

 respecting this type, the genital organs and the actinostome 

 differ from all the other Discophorte known at present, but 

 recall somewhat those of the Lucernariadaj ; while the mar- 

 ginal portion of the lower floor resembles Cyanea. In Quoyia 

 the eyes have probably been overlooked, or mistaken for torn 

 tentacles. 

 Dodecabostrycha Br. 



D. dubia Br., Acad. St. Petersb., 1838, Pis. 29 and 30. Origin 

 imJcnoum. From drawings by Merteus. 

 Quoyia Agass. The dark-colored pigment, lining the main cavity 

 .and its radiating pouches, renders the structure of this genus 

 very conspicuous. The margin of the disk is deeply inden- 

 tated, and between its lobes hang the tentacles. 

 Q. bicolor %. — Charybdea bicolor Q. and G., Zool. Astr., PI. 25. 

 figs. l-i.— Cape de Vcrd Islands (Quoy and Gaimard). 

 3d Family. Ciiarybdeid.^ Less., Prodr., 1837 (not Gegenk). 



Chary bdea PSr. and LeS.; spelled Carybdea by Per. and LeS. 



C. periphylla Fir. and LeS., DeBlainv., Act., PI. 31, fig. 1 ■ Milne. 

 Edw., in Cuvier's Eegne An., PI. 55, fig. 2, copied from Le- 

 Sueur. — Allaniic Ocean, under Ihc Equator (Pgron and LeSueur). 

 The figure of this species, drawn by LeSueur, and pub- 

 lished for the first time by De Blainville, represents, unques- 

 tionably, a mutilated animal ; but, applying to its restoration 

 the method so successfully employed in palaeontology, it is 

 evident that there are two kinds of marginal lobes, while in 

 the Marsupialidaj there is but one kind. Four sets of these 

 appendages are double, and between each pair there is a 

 tentacle. In the four intervals between these double lobes, 

 there are two simple lobes. The simple lobes are folded on 

 both sides, the double ones, only on one side, the tentacle 

 representing, as it were, the axis of the simple lobes, set free. 

 Fundamental number of parts four, as in Marsupialidfe. 



As established by P^ron and LeSueur, this genus contains 

 the types of two very distinct families, the Charybdeidae and 

 the Marsupialidaj, first pointed out by Lesson, who, however, 

 associated with both of them several species which have not 

 the remotest affinity with the type. So the genus Obelia, 



