114 CLASS III. 
[See KOELLIKER’Ss description of a new species (1. 1. p. 19, Tab. v.) found by 
him at Messina, and which he calls Physs. Philippi. 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 nettlenode 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. 
Rhizophysa Pron. No swimming bells: the polyps with 
their prehensile organs lateral, usually secund: bracts and feelers 
wanting. 
Sp. Rhizophysa Peronit Escuscu. Acal. Taf. xm. fig. 3. Rhizophysa filifor- 
mis LAM., Zeitschrift fiir wissensch. Zoologie, V. 8. 324—330. Taf. xviil. fiz. 
pert. 
d) with long axis or stem and swimming bells at the upper 
part of the common stem. 
Stephanomia Pséron, Escuscu. 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 LxesunuR does not, according to 
KoE.uiker, differ from Apolemia Escuscn. 
In a specimen of Stephanomia four feet in length LrucKart 
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 
