Observations on British Zoophytes. 379 
it is an elastic tube, which appears to consist of denser tissue 
than either of the elements of the body. The axis of the 
tube is occupied along its whole length by a powerful mus- 
cular band, which is well seen in the figure (PL XIX. fig. 
1 cQ, in which the tube is distended with v\rater, as sometimes 
occurs. The animals are very sluggish, remaining for days 
motionless, with all their rays extended ; but the moment they 
are touched they vanish, drawn close down by their powerful 
muscular apparatus into the interstices of the shells in which 
they are generally found. Zooteirea multiplies by gemma- 
tion. The bud, which is given ofP close to the stalk, sepa- 
rates as a minute Actinophrys, w^hich instantly fixes itself 
and develops its stalk. The low^er part of the stalk is in- 
cluded in a mass of gelatinous tissue into which the animal 
can entirely retract itself. The long tentacles of Zooteirea 
religata can only be properly brought into " black ground 
illumination," when they appear like the rays of a silvery 
star, slightly curving under the influence of currents in the 
waters. 
4. Freya [Lagotict) obstetrica, Freya stylifer (n. sp , T. S. W.) 
It is now some years since I described several species 
of the new genus Lagotia to the Society. It appears, how- 
ever, that Claparede and Lachmann had already consti- 
tuted the genus Freya for animals evidently belonging to 
my genus Lagotia, in a memoir which they communicated 
to the French Academy, which memoir was printed after my 
communication to this Society. The species of Freya dis- 
covered by them, differed from any of my species, and I have 
now to describe two other species of this very remarkable 
genus. Freya ohstetrica (PI. XIX. fig. 4.) — *' Lobes of rota- 
tory organ very broad, not folded ; the tips bluntly rounded 
and incurved, so as to resemble very closely the blades of 
the obstetric forceps. Body fusiform, scarcely longer than 
the rotatory lobes. Nucleus large, colourless, surrounded 
by dense green pigment. Body and rotatory lobes covered 
with striae, bearing fringes of cilia. Cell flask-shaped, with- 
out a trumpet-shaped mouth. Colour of animal and cell 
pale bluish green." Freya stylifer (figs. 5, 6.) — " Kotatory 
lobes short, narrow, and widely expanded, one of the lobes 
bearing at its tip a fleshly prolongation or style as long as 
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