ON RECENT POLYZOA. 511 
Family Eucratiide, Hincks. 
Genus. Rhabdozoum, Hincks. 
(‘ Annais and Mag. Nat. Hist.’, vol. x. ser. 5, 1882.) 
‘Zoarium erect phytoid, composed of numerous celluliferous shoots, 
held together by a ramified stem, made up of bundles of radical fibres, 
given off from the inferior portion of the shoots; celluliferous shoots 
consisting of a cylindrical bi- or tri-furcate stem, which gives origin to 
the radical fibres, and also to erect chitinous rods, on the summit of 
_ which are borne two or three similar stems, more or less dichotomously 
_ divided. Zocecia pyriform, ranged in linear series round an imaginary 
axis, so as to form cylindrical stems; aperture moderately large, sub- 
terminal oblique. Avicularia not stipitate.’—Hincks. 
Rhabdozoum Wilsoni, Hincks, op. cit. p. 162 pl. viii. fig. 4. 
Locality : Port Phillip Head, Victoria, Mr. Bracebridge Wilson. 
Family III. Chlidoniade, Bush. 
‘Zocecium composed of upright, free, segmented stems, springing from 
a stolonate network. From the segments, after the first bifurcation, 
arise lateral branches consisting of chains of zocecia arising from the back 
near the summit. Zocecia bicamerate; unarmed.’—Busk, ‘Chal. Rep.” 
p. 8. 
Genus 6. Chlidonia, Savigny (1811) 
=Evorarna, Aud. (?) Vorricensa, Linn. & Esper. 
= CorHuRNICELLA, Wyv. Thomson. 
‘Free portion of the zocecium composed of segmented tubular stems 
_ with distant short branches, each springing from one of the internodes of 
_ the stem, and giving off numerous uniserial chains of zocecia, one rising 
_ from the back of another near the top, and all looking one way. Zocecia 
_ gibbons, pyriform, or attenuated downwards. Orifice prominent or gub- 
tubular, lower lip entire, straight. The cavity of the zocecium divided 
_ into two chambers, the hinder of which is much curved, and alone com- 
" municates with the orifice and lodges the polypide.’—Busk, ‘ Chal. Rep,’ 
Dm. 8. 
\ Chlidonia cordiera, Aud. (Bush, ‘Chal. Rep.’ pl. xxviii. fig. 11) 
=Evorarsa corpiera, Awd., ‘ Agypta,’ pl. xiii. fig. 3 
= Cutponta corprera, D’Orb., ‘ Pal. Fr.’ p. 40 
= COTHURNICELLA DHDALA, Wyv. Thomson, ‘ Nat. Hist. Rev.’ 
vol. v. p. 146. 
This species is very generally distributed. Mr. Busk gives it as 
‘Occurring at only one station—No. 186. Mr. A. W. Waters describes it 
in his ‘ Bay of Naples Bryozoa.’ Wyville Thomson’s Australian form is 
from Port Phillip. It is also met with at the Canaries, ‘and I have 
‘Specimens from the coast of Calvados, from Nice, Egypt (Sir Jos. Banks), 
and Tyre (Miss Gatty).’—Busk, ‘Chal. Rep.’ p. 9. 
