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THE VOYAGE OF H.M.S. CHALLENGER. 
Prof. Smitt, and am strongly inclined to think that his Cellepora albirostris is identical 
with my Cellepora bispinata. Unfortunately I have no specimen of the latter to 
compare, and the figure and description in the Brit. Mus. Cat. are hardly sufficient to 
determine the point. Under these circumstances I have thought it best to retain Prof. 
Smitt’s appellation. I would remark, however, that the term “ very minute,” as applied 
to the usual kind of rostral avicularium, quite accords with that of Cellepora albirostris ; 
the large rostral avicularia are only occasional. 
With respect to Prof. Smitt’s supposition that Cellepora albirostris and my Cellepora 
mamillata may be connected, I would observe, if I understand him correctly, that there 
can be no doubt of their complete distinctness. Nor can I see any reason for regarding 
the form described by Prof. Smitt under the name of Cellepora (. Discopora ) pusilla as 
merely a variety of his Cellepora albirostris ; the two seem to me quite distinct, and 
how their close relation is “ incontestably proved by the very same form of their zocecial 
aperture,” seems to me to be by no means clear, seeing that the form of aperture in 
question is one of very common occurrence. 
(4) Cellepora aspera, n. sp. (PI. XXVIII. fig. 6). 
Character. — Zoarium erect, cylindrical, irregularly branched, branches expanded at 
the end. Zooecia immersed and ventricose below, produced or subtubular upwards, with 
a single row of punctures round the base, surface smooth, wall thick and porcellanous. 
Orifice suborbicular, with a wide sinus within which is an avicularium with a semicircular 
mandible ; peristome thick, even. A few interspersed vicarious avicularia with short 
spatulate mandible. Ocecia % Operculum transversely elliptical, with a nearly straight 
lower border, (UOOSS x ‘004. 
Habitat. —Station 122, 9° 5' S., 34° 50' W. ; 350 fathoms, red mud. 
The single specimen of this species is old and partially dead. 
(5) Cellepora columnaris, n. sp. (PI. XXIX. fig. 11, and PI. XXXV. fig. 16). 
Character. — Zoarium expanded, thick, irregular in form and extent. Zooecia deeply 
immersed, ventricose, but with the outlines very obscure ; substance of wall solid, 
porcellanous ; surface finely granular ; orifice semicircular, lower lip straight and entire. 
A long, solid, tapering, columnar process springs from the back of the zooecium close to 
the mouth, and rather to one side. In many zooecia there is a small tubercular 
avicularian process in front below the orifice, which also sometimes rises in a columnar 
form ; mandible triangular. 
Habitat. — Station 162, off East Moncoeur Island, Bass Strait, 38 fathoms, sand and 
shells. 
