NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
191 
the membrane which closes the opesium is a flabelliform spine jutting forward. 
Therefore, it replaces the scutum, and its origin is the same. As the Menipea clausa 
Busk, 1881, is a synonym of Scrupo cellar ia marsupiata , this specific term is free for 
use for the present species. The false costules observed are only remains of the 
ramifications of the primitive spine. Our fossil species differs from the recent form 
in its smaller gymnocyst, its very salient distal avicularium, and its smaller micro- 
metric dimensions. 
Scrupocellaria marsupiata Jullien has been found at depths of 2,018 and 2,713 
meters, but these figures do not indicate the real habitat. These articulated species 
live more often attached to algae at the surface of the sea, and are deposited in the 
great depths after their death. We can not. therefore, consider these figures in re- 
storing the bathymetric lines of the Eocene Gulf. 
Occurrence . — Vicksburgian (Marianna limestone) : Salt Mountain, 5 miles 
south of Jackson, Alabama (rare) : west bank of Conecuh Biver, 1 mile below mouth 
of Sepulga Biver, Escambia County, Alabama (rare) ; Murder Creek, east of Cas- 
tlebury, Conecuh County, Alabama (rare). 
Vicksburgian (Bryam marl) : West of Woodward, Wayne County, Mississippi 
(very rare). 
Cotypes. — Cat. Nos. 61247, 64248, U.S.N.M. 
Genus CABEREA Lamouroux, 1816. 
1816. Caberea Lamorotjx, Historic des Polypiers Coralligenes flexibles. 
Zoarium not articulated. Zooecia in two or more series, subquadrangular or 
ovate, with a very large aperture. Sessile frontal avicularia on the side and front 
of zooecia ; lateral avicularia minute. Vibracular cells very large, placed in two 
rows stretching obliquely downward across the back of the zooecia, which they 
almost cover, to the median line, notched above and traversed through a great por- 
tion of their length by a shallow groove. Vibracula usually toothed on one side. 
(Bobertson.) 
Genotype. — Caberea boryi Audouin, 1826. 
Range. — Vicksburgian-Becent. 
CABEREA BORYI Audouin, 1826. 
Plate 81, figs. 33, 34. 
1826. Grisia boryi ( Savigny ) Audouin, Explication sommaire des planches de Polypes de 
l’Egypte et de la Syrie, in Savigny’s Description de l’Egypte, Histore Naturelle, 
vol. 3, p. 73, pi. 12, fig. 4. 
1880. Caberea boryi Hindis, British Marine Polyzoa, p. 61, pi. 8. figs. 9-11. 
1889. Caberea boryi Jelly, A Synonymic Catalogue of Marine Bryozoa, p. 31. London 
(see for earlier references). 
1892. Caberea boryi Waters, Observations on the gland-like bodies in the bryozoa, Journal 
Linnean Society, London, Zoology, vol. 24, p. 272. 
1896. Caberea boryi Waters, Notes on the Bryozoa from Rapallo and other Mediterranean 
localities, chiefly Cellulariidae, Journal Linnean Society, London, Zoology, vol 26, p. 9. 
