114 CLASS ITT. 



[See KOELLIKER'S description of a new species (1. 1. p. 19, Tab. v.) found by 

 him at Messina, and which he calls Physs. PJdlippi. The type of Physsophora 

 is distinguished by the very small length of the axis below the swimming 

 column. The column is as usual terminated by a small bladder above the bells 

 filled with air. Beneath it the polyps, feelers, prehensile and sexual organs 

 are all compressed into a small space. The feelers surround the axis immedi- 

 ately beneath the bells in a continuous coronet, like the calyx of a flower. 

 They are described by KOELLIKER as exceedingly sensitive, in constant 

 motion, and even laying hold of prey. Within the circlet of feelers arise 

 the Polyps, each with its prehensile filament. The nettle-node has an 

 exceptional formation. There are no bracts or covers, their protective office 

 being supplied by the near neighbourhood of the swimming column. The 

 sexual organs are seated in bunches on the stem close to the Polyps, a pair 

 of different sex at the base of every Polyp. 



c) with long axis without swimming bells. 



RMzophysa PE"RON. No swimming bells : the polyps with 

 their prehensile organs lateral, usually secund : bracts and feelers 

 wanting. 



Sp. Khizopliysa Peronii ESCHSCH. Acal. Taf. xm. fig. 3. RJdzopliysa filifor- 

 mis LAM., Zeiteckrift fur wissensch. Zooloyie, v. s. 324 330. Taf. xvin. fi r . 

 5 ii. 



d) with long axis or stem and swimming bells at the upper 

 part of the common stem. 



Stephanomia PERON, ESCHSCH. Swimming bells numerous, 

 forming a conical column which surrounds the stem with many 

 spiral turns. Polyps set on the stem by a long, slender, contractile 

 pedicle. Feelers pediculate affixed to the stem, usually in threes 

 between two successive Polyps. Bracts or covers not confined to 

 the stem, but also surrounding the base of the Polyps as the calyx 

 a flower. Prehensile filaments very long with lateral branches 

 at regular intervals bearing a node and terminating in a single 

 thread. Sexual organs in bunches close set on the feelers from 

 the stem. 



The Stephanomia uvaria of LESUEUR does not, according to 

 KOELLIKER, differ from Apolemia ESCHSCH. 



In a specimen of Stephanomia four feet in length LEUCKART 

 counted no less than 20 spiral turns in the swimming column, with 

 10 12 bells in each turn. The three feelers from the stem are two 

 on a common pedicle and one sessile. The male and female organs 



