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PROCEEDINGS OF THE [April, 1857. 



into another group when Cunina is finally sub-divided. We now 

 proceed to the description of the species. 



S TIB- ORDER— END OS TO MA TA. 



Bell always deep, never disciform. Ocelli generally present; 

 marginal capsules never, at any stage of growth. Development 

 always an individualized metamorphosis or alternate generation. 

 Bell-wall enclosing the digestive trunk in the medusa-bell from 

 its first appearance. Or, since the digestive trunk is sometimes 

 wanting, it may be, perhaps, better expressed — that the cavity of 

 the bell is at first a blind sack, formed before the opening of vail, 

 by which it subsequently communicates with the surrounding me- 

 dium. 



1st group CORYNID^:. Johnston. 



Larva Coryne ; consisting of a fusi-form polyp, with scattered 

 tentacula usually clavate at tip. Among these tentacula, or just 

 beneath them, are developed the Medusa-buds. External surface 

 of the Medusa-bell usually beset with scattered thread-cells not ar- 

 ranged in regular lines. Tentacula varying in number. Diges- 

 tive trunk nearly always elongate. 



The group of Corynidee contains three lesser divisions, which 

 we distinguish as follows, so long as no connecting links between 

 them are known to Science. 



i. oceanic. Eschscholtz. 



General form, spherical, conical, or truncate, tentacula having 

 elongate and mostly fusiform bulbs ; their number is various, but 

 usually great; position of the ocellus variable, sometimes it appears 

 to be absent altogether; digestive trunk rriassive ; sexual organs 

 generally circumscribed and arranged in four distinct lobes about 

 the digestive cavity; mouth surrounded by an armature of four 

 leaf-shaped oral tentacula. 



TURRIT.OPSIS, nov. gen. 



General form deeply campanulate; tentacula numerous, making- 

 the entire circle of the bell-margin; no conspicuous vertical mus- 

 cular bands as in Turn's. Ocelli on the inner or lower side of 

 the tentacula. The upper part of the tentaculum, which at its 

 free extremity carries the ocellus, has the appearance of being 

 slightly distinguished from the rest, even when extended, and is 



