ON RECENT POLYZOA. 529 
ecupied by a hollow membranous expansion (modified zocecium ?). 
jowecia oblong, elongated, almost entirely membranous in front, which is 
epressed or flat, with an acute angular border. Avicularia, when 
resent, sessile or sub-immersed, placed at the bottom in front, Mouth 
lose to the summit, more or less protruded, the oral valve projecting. 
Jeecia cucullate, superior. 
_ Hight species are described in the ‘ Challenger Report,’ all of which 
re new, and as these peculiar forms are found generally in deep seas I 
ve given the depth in which each form was taken, the same as in some 
he species of the genus Bugula in a former part of the present 
1. Farciminaria atlantica, Busk, ‘ Chal. Rep.’ pl. xxxi. fig. 6. 450- 
390 fathoms. 
2. s cribraria, Busk, ‘ Chal. Rep.’ pl. v. fig. 2. 1,900 
fathoms, 
% magna, Busk, ‘Chal. Rep.’ pl. v. fig. 1. 1,675 and 
2,650 fathoms. 
- Var. armata, Busk, ‘Chal. Rep.’ pl: xe. fie, 1. 
1,900 fathoms. 
sn Brasiliensis, Busk, ‘Chal. Rep.’ pl. xxxi. fig. 2. 400 
fathoms. 
4 Pacifica, Busk, ‘Chal. Rep.’ pl. xxxi. fig. 4. 2,300 
fathoms. 
u gracilis, Busk, ‘Chal. Rep.’ pl. v. fig. 3. 1,675 
fathoms, 32 to 400 fathoms. 
- delicatissima, Busk, ‘Chal. Rep.’ pl. xxxi. fig. 5. 
1,900, 2,175, 2,400, 1,850, and 1,950 fathoms. 
% hexagona, Busk, ‘Chal. Rep.’ pl. xiv. fig. 10, 
pl. xxxi. fig. 3. 140 to 310, 825, and 1,425 
fathoms. 
n these Farciminariw very peculiar characters are noted by the 
or, and the student of both the recent and fossil species of Polyzoa 
d do well to refer to them. 
if we except the two species already placed in the genus Verrucularia 
Suhr) the only species described in the ‘ Brit, Mus, Cat.’ by Mr. Busk 
he following, which will make nine species in all :— 
9. Farciminaria aculeata, Busk, ‘ Brit. Mus. Cat.’ 
Btr)at .,, uncinata, Hincks, ‘Ann. Mag. Nat. Hist.’ Oct. 1884, 
p. 277, pl. viii. fig. 2. 
his is the Australian species originally described by Mr. Busk, but 
- atlantica, Busk, No. 1 of the above list, ‘strongly resembles’ F. 
ia. specially so ‘in the aculeate marginal spines being simple, 
| not furcate, as they mostly are in the Australian species, on the 
nness and comparatively smaller size of ocecium, and in the’ pre- 
ence on very many of the zowcia of a large avicularium.’ ! 
* 1 Busk, Chal. Rep. p. 49. 
