Bulletin - United States National Museum - Smithsonian Institution
Bulletin - United States National Museum - Smithsonian Institution
Bulletin - United States National Museum - Smithsonian Institution
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EARLY TERTIARY CHEILOSTOME BRYOZOA. 75<br />
SCHIZORTHOSECOS INTERSTITIA Lea, 1833.<br />
Plate 6, figs. 4, 5.<br />
1833. OrbitoUtes interstitia Lea, Contribution to Geologj% Philadelphia, p.<br />
191, pi. 6, fig. 204.<br />
1862. Lunnlites interstitm Gabb and Horn, Monograph fossil Polyzoa<br />
Secondary and Tertiary formations North America, Journal Academy<br />
Natural Science, Philadelphia (2), vol. 5, p. 120.<br />
1890. LunuUtes (Cupiilaria) interstitia De Gregoria, Monographie Fauna<br />
Eocenique de Alabama, Annal. de Geologic et du Paleontologie, pts.<br />
7, 8, p. 249, pi. 42, figs. 1&-22.<br />
Descr/pti'on.—The zoarium is ciipiiliform, little deep. The zocecia<br />
are distinct, tubular, erect, terminated by a narrowed peristomie.<br />
The apertura is placed at the base of the peristomie ; in its rimule, it<br />
often has a flat lyrule; the peristomice is of the same form as the<br />
apertura. Between the peristomes, on the external surface, there<br />
are numerous zooeciules which are transformed according to their<br />
position into radicular zooeciules, into avicularia with pivot, or into<br />
compensation zooeciules. On the inner face each zooecium is indi-<br />
cated by a hexagon perforated with 6 to 10 large tremopores, wdiich<br />
are the orifices of long tubules; some large avicularia with pivot<br />
surround the ancestrula.<br />
Occurrence.—Claibornian:<br />
and many other localities.<br />
Claiborne, Alabama (very common),<br />
Lower Jacksonian: Jackson, Mississippi<br />
Type.—C^t. No. 62609, U.S.N.M.<br />
(very common).<br />
Genus ORBITULIPORA Stoliczka, 1862.<br />
1862. OrbituUpora Stoliczka, Oligocane Bryozoen von Latdorf in Bernburg,<br />
Sitzimgsberichte der k. Akademie der Wissenschaften, Wien, vol. 4.5,<br />
Abth.. p. 90.<br />
The apertura is orbicular. The frontal is a tremocyst. The zoarium<br />
is orbicular and formed of two lamellae with zocecia back to<br />
back.<br />
Genotype—OrhituUpora {Cellepora) petiolus Lonsdale, 1850.<br />
Range.—Auversian-Tortonian.<br />
Genus BATOPORA Reuss, 1847.<br />
1847. Batopora Reuss. Die fossilien Polypnrien des Wiener Tertiarbeckens,<br />
Haidinger's naturwissenschaftliche, Abth. vol. 2, Wien, p. 78.<br />
The apertura is orbicular. The frontal is a granular olocyst.<br />
The zoarium is conical, never hollow. The ancestrular zooecium is<br />
ornamented with radicular pores.<br />
Genotype.—Batopora rosula Reuss, 1847.<br />
Range.—Lutecian-Tortonian.
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