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RADIOPOEID^. 
MULTICAVEA, d’Orbigny, 1853. 
[Bry. Cret. p. 975.] 
Synonym. 
Multicavea, Hamm, 1881 ; Pergens, 1890 ; Ulrich, 1900. 
Diagnosis. 
Radioporidse in which the zoarium is dendroid. The zooeciu 
are arranged with their apertures opening in uniserial lines, 
arranged radially around circular cancellate areas on the 
stems. The central axis consists of a bundle of long parallel 
zooecia. 
Type Species. 
Multicavea magnifica, (iiOvhi^nx, 1853. Senonian : France. 
Affinities. 
This genus may be described as consisting of colonies of 
Biscocavea growing into a dendroid zoarium. 
UNREPRESENTED SPECIES. 
1. magnifica, d’Orbigny, 1854. 
Syn. Multicavea magtiifica, d’Orbigny, 1854. Bry. Cret. p. 977, pi. 778, tig. 10» 
pi. 779. 
,, ,, Hamm, 1881. Bry. mastr. Ob.-Sen. i., Cycl. p. 40, 
tigs. 1-4. 
,, ,, Pergens, 1890. Eev. p. 384. 
Char. — Zoarium of cylindrical branches from 3 to 6 mm. in diameter. Zoarium 
growing in large tufts, 80 mm. high. The radial lines of zooecia are short, 
usually containing three apertures, and the lines are widely separated, and there 
are about ten or twelve radial lines in each group. 
Distrib. — Senonian — Maastricbtian : Boyan, Charente-Inferieure. 
2. animlata, Hamm, 1881. 
Syn. Multicavea annulata, Hamm, 1881. Bry. mastr. Ob. -Sen. i., Cycl. p. 40. 
Char. — “Zoarium irregularly and dichotomously branched; the branches are 
thick and cylindrical, and the upper surface is traversed by wave-like cross 
folds. The top of the cross folds forms the middle point of the groups of 
zooocia ; these groups are also much elongated transversely. The apertures 
are very small, and thickly crowded; the larger are quite surrounded with 
a weak, ring-shaped edge, and stand in very irregular, often quite indistinct 
series, which are arranged at right angles to the transverse ridges.” (Hamm.) 
Distrib. — Senonian — Maastrichtian : Petersberg, Maastricht. 
