192 
THE VOYAGE OF H.M.S. CHALLENGER. 
3. Tlie Kerguelen or South Indian Region six, all from the neighbourhood of 
Kerguelen Island, and from depths varying from 20 to 500 fathoms. 
4. The Australian Region twelve, all, with one exception ( Cellepora solida), from 
depths varying from 2 to probably not more than 40 fathoms. The excep- 
tion is a very aberrant form and only doubtfully referred to the same 
genus ; it was procured from a depth of 2600 fathoms. 
5. The North Pacific region furnished four species, at depths varying from 10 to 
30 fathoms. 
6. The South Pacific, only two, one from a depth of 45 fathoms, whilst the other 
appears to have been brought up from 1325 fathoms, near the western coast 
of South America. A curious circumstance, since the same species, Cellepora 
eatonensis (var. magellanica), occurred near the Falkland Islands at a depth 
of not more than 5 to 12 fathoms. 
On the whole the genus as represented in the present collection would appear to 
belong to comparatively shallow water. 
§ 1. Operculum suborbicular or semicircular with a nearly straight lower border ; 
avicularian mandibles with a short median columella. 1 
§§ a. lobate , branched, or massive. 
(1) Cellepora hastigera, n. sp. (PL XXIX. fig. 1, and PI. XXX Y. fig. 8). 
Character. — Zoarium erect, expanded, lobate. Zooecia deeply immersed, surface 
entire, dull. Orifice (primary) suborbicular, with a slightly sinuated lower border and 
no sjnnes. Pre-oral rostra of two kinds, one very stout and subconical, supporting 
on the posterior face, either at or near the apex or lower down, an avicularium 
with either an acute or a duck-bill shaped mandible, and a toothed beak ; the other 
slenderer and very acute, with a small lateral semicircular avicularium at the base 
overhanging a notch. 
Habitat. — Station 162, off East Moncoeur Island, Bass Strait, 38 fathoms, sand and 
shells. 
In some respects the characters of this form render it doubtful whether it may 
not be a variety of Cellepora bispinata, Brit. Mus. Cat., or Cellepora (. Discopora ) 
albirostris, Smitt, Florid. Bryoz., but the total absence of any sign of the two long slender 
oral spines, present in those species, and the different form and proportions of the pre-oral 
rostral processes, render them, in my opinion, sufficiently distinct. 
1 Vide note, p. 190. 
