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THE VOYAGE OF H.M.S. CHALLENGER. 
Family XXII. Celleporida:. 
Celleporidce, Johnst., Brit. Mus. Cat., Hincks, &c. 
Escharidce (pars), d’Orb. 
Mynozoidce (pars), Smitt. 
Character . — Zooecia urceolate, erect or suberect, irregularly heaped together and often 
forming several superimposed layers. 
1. Cellepora. 
Cellepora (pars), Fabric., Linn., &c., Brit. Mus. Cat., Johnst., Hincks, Auctt. 
Tubipora (pars), Linn. 
Millepora (pars), Ell. and Soland. 
Celleporaria, Lamx., Reuss, d’Orb., &c. 
Spongites, Oken. 
Character. — Zoarium multiform ; lamellar and encrusting, partially adnate, or 
free ; or erect and attached by a thick base, massive or irregularly branched, solid or 
hollow ; or in the shape of small parasitic pisiform or discoid growths. Zooecia in the 
older portions more or less erect or vertical, very irregularly disposed or heaped together. 
Orifice entire or sinuated in front, with or without internal denticles. A pre-oral rostral 
process (sometimes aborted) usually supporting an avicularium ; very generally inter- 
spersed avicularia. 
The species here enumerated of this multiform and perplexing genus, may be con- 
veniently arranged in two principal more or less artificial sections or groups, characterized 
primarily by the form of the operculum and secondarily by the general zoarial habit. 
§ 1. Operculum suborbicular or semicircular, with a nearly straight lower border; 
avicularian mandibles usually with a short median columella. 1 
§§ a. lohate, branched, or massive. 
(1) Cellepora hcistigera, n. sp. (PL XXIX. fig. 1). 
(2) Cellepora tuberculata, n. sp. (PI. XXVIII. fig. 9). 
(3) Cellepora i albirostris, Smitt (PL XXXIV. fig. 7). 
(4) Cellepora aspera, n. sp. (Pl. XXVIII. fig. 6). 
(5) Cellepora columnari, n. sp. (Pl. XXIX. fig. 11). 
(6) Cellepora honolulensis, n. sp. (Pl. XXIX. fig. 5). 
(7) Cellepora imbellis, n. sp. (Pl. XXIX. fig. 7). 
(8) Cellepora jacksoniensis, n. sp. (PL XXX. fig. 10). 
(9) Cellepora poly morpha, n. sp. (Pl. XXX. fig. 11). 
1 This character, however, seems to be confined to species belonging to the Southern Hemisphere, as it is not 
present in the Mediterranean Cellepora sardonica and Cellepora digitata. 
