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THE VOYAGE OF H.M.S. CHALLENGER. 
(27) Cellepora ansata, n. sp. (PL XXX. fig. 4, and PI. XXXYI. fig. 17). 
Character. — Zoarium in the form of small stellate growths or tufts, having three or 
four conical, pointed divisions. Zooecia deeply immersed at the base, but more free and 
erect above ; surface shining, rugose. Orifice circular, notched ; peristome in the older 
zocecia produced in front and on the sides into a long, tubular or rather canalicular 
process, which supports on each side a small avicularium with a semicircular mandible. 
Numerous interspersed retentive avicularia, with curved, spatulate, membranous mandible. 
Habitat. — Station 75, lat. 38° 37' N., long. 28° 30' W., 450 fathoms, sand (parasitic 
on a small Sertularian -T) 
(28) Cellepora canaliculata, n. sp. (PL XXX. fig. 5, and Pl. XXXYI. fig. 16). 
Character. — Zoarium pisiform. Zocecia ventricose, tolerably distinct ; surface rough, 
entire. Orifice orbicular and notched in front, or more usually clithridiate. A strong 
curved pre-oral rostrum, from which a thin expansion is continued on each side of the 
mouth so as to form a spacious spout-like cavity, at the bottom of which the mouth is 
situated ; on the posterior aspect of the rostrum, near the summit, is an avicularium with 
a semicircular mandible ; the apical portion of the process is cylindrical. 
Habitat. — Station 48, lat. 43° 2' N., long. 64° 2' W., 51 fathoms, rock. 
(29) Cellepora bidenticulata (Pl. XXX. fig. 6, and Pl. XXXYI. fig. 6). 
Character. — Zoarium small, pisiform. Zooecia ventricose, walls thin, sparsely 
punctured. Orifice (fig. 6a) sub clithridiate, with two very minute denticles within the 
lower border ; peristome in the older zooecia (fig. 6b) raised on one side into a thin canali- 
cular expansion and on the opposite side into a thicker process which supports on its 
inner face a rather large avicularium, with a triangular, obtuse mandible. 
Habitat. — Station 163b, off Port Jackson, 35 fathoms, hard ground (parasitic on a 
Sertularian). 
Var. a. subcequalis (Pl. XXXVI. fig. 11) (chitinous parts). 
Habitat. — Station 162, off East Moncoeur Island, Bass Strait, 38 fathoms, sand and 
shells. 
Differs from the form represented in the specimens from Station 163a in the smaller 
size of the operculum, which is pretty nearly of the same dimensions as the oral avicu- 
larian mandible. 
