NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
531 
Occurrence . — Middle Jacksonian: Wilmington. North Carolina (rare); near 
Lenuds Ferry, South Carolina (common) ; 17 miles northeast of Hawkinsville, 
Georgia (rare). 
Cotypes. — Cat. No. 64175, U.S.N.M. 
CHEILOPORA SPECULA, new species. 
Plate 69', figs. 1-5. 
Descrip tion.-.CYhe zoarium incrusts bryozoa and shells. The zooecia are 
large, elongated, distinct, utricular; the frontal is Comdex, with numerous tremo- 
pores. The apertura is elliptical, transverse; the poster is as large as the ant er; 
there are two salient cardelles; the peristome is incomplete in front; the distal 
part is extraordinarily developed, very long, semicylindrical. The ovicell is 
endozooecial, convex, globular, somewhat salient, covered with tremopores like 
the frontal. The two frontal avicularia are small, symmetrical, tubular. 
M easuremen ts. — Apert ura 
j ha— 0.12-0.15 mm. 
\la=0. 18-0.20 mm. 
Zs=0.75-0.85 mm. 
Venations. — This species is quite remarkable in the great, development of a 
part of its peristome, which forms a sort of watchtower above the apertura. This 
appendage is often lobecl or bifurcated. It is very often broken on our fossils 
and it assumes the most varied and incoherent forms. It does not exist on the 
ovicelled zooecia, which bear only two long, lateral, very salient palettes. It is 
evident that this peristome is not in rapport with the passage of the eggs. It 
appears to us to be simply like an apparatus (or more exactly like a trap) destined 
to retain the diatoms serving as the habitual nourishment for the bryozoa. The 
funnel-shaped gullet which terminates it superiorly confirms this hypothesis, for 
it facilitates the issue of the streams of water. It is a perfect adaptation to the 
principle of the flow of the liquids and of their decantation. For a long time the 
bryozoa have invented such “ spouts.” 
Occurrence. — Middle Jacksonian (Castle Hayne limestone) : Wilmington, 
North Carolina (common). 
Cotypes. — Cat. No. 64178, U.S.N.M. 
CHEILOPORA SULCIFERA, new species. 
Plate 69, figs. 7, 8. 
Description. — The zoarium is unilamellar and creeps on algae. The zooecia 
are distinct, lozenge-shaped, utricular; the frontal is convex; it is covered with 
tremopores often transformed into sulci. The apertura is oval, transverse; it is 
formed of a semilunar anter, separated by two condyles from a wide, concave and 
triangular rimule. The ovicell is endozooecial, small, transverse, little salient, 
porous. The two frontal avicularia (?) are oblique, tubular, symmetrically placed. 
M easurements. — Apertura 
\h a =0.15 mm. 
|Za==0.15-0.18 mm. 
Zooecia 
fZs=i).90-1.00mm. 
0.75— 0.90 mm. 
