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, 1884, is a synonym of ScnipoceUaria 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. it> very salient distal avicularium. and its smaller micro- 

 metric dimensions. 



Scrupocellaria matwipiata 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. 



Occitn'cnce. Vicksburgian (Marianna limestone) : Salt Mountain. 5 miles 

 south of Jackson, Alabama (rare) : west bank of Conecuh Eiver. 1 mile below mouth 

 of Sepulga Eiver, Escambia County, Alabama (rare) : Murder Creek, east of Cas- 

 tlebury. Conecuh County, Alabama (rare). 



Vicksburgian (Bryani marl) : West of Woodward. Wayne County, Mississippi 

 (very rare). 



Cotypes.CsA: Nos. 6424T, 64248, U.S.N.M. 



Genus CABEREA Lamouroux, 1816. 



1816. Cubcrea LAMOROUX. Historie ties Polypiors Coralligeues flexible*. 



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. 

 (Kobertson.) 



Genotype. Caberea l>oryi Audouin, 1826. 



Range. Vicksburgian-Eecent. 



CABEREA liollt I Audouin, 1826. 



Plate 81, figs. 33, 34. 



1826. Crisia boryi (Savigny) AUDOUIN, Explication sornruaire ties planches de Polypes de 

 1'Egypte et de la Syrie, in Savigny 's Description de 1'Egypte,. Histore Naturelle, 



vol. 3, p. 73, pi. 12. fig. 4. 



1880. Caberea boryi Hincks. British Marine Polyzoa. p. 61. pi. S. figs, fi-11. 

 1SS9. Caberea boryi JELLY. A Synonymic Catalogue of Marine Bryozoa. p. 31. London 



(see for earlier references). 

 1802. Caberea, boryi WATERS. Observations on the gland-like bodies in tin- bryozou. Journal 



Linnean Society. London. Zoology, vol. 24, p. 272. 

 1896. Caberea boryi WATERS. Notes on the Bryozoa from Rnpalli. ami other Mediterranean 



localities, chiefly Cellnlariidae. Journal Linnean Society, London. Zoology, vol 26, p. 9. 



