NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
655 
STOMATOPORA CONTRACTA, new species. 
Plate 105, figs. 1, 2. 
Description. — The zoarium creeps over shells ( T erebratula ) forming irregular 
polygons; the clichotomization occurs almost at right angles. The tubes are oval, 
contracted at their extremity, finely striated transversely. The peristome is orbic- 
ular, thick, little salient. 
I Diameter of tube 0.36 mm. 
Measurements. — • Length of tube 0.50-0.60 mm. 
| Length of peristomie 0.16 mm. 
In the specimen shown in our figure, three tubes appear to have undergone 
total regeneration. 
O ccurrence. — Midwayan (Clayton limestone) : Well at Brundidge, Alabama 
(very rare). 
Iioiotype. — Cat. No. 65249, U.S.N.M. 
STOMATOPORA EXIGUA, new species. 
Plate 107, fig. 26. 
Description. — The zoarium incrusts shells. The tubes are fusiform, narrow , 
striated transversally. The peristome is thin, oblique, round, or elliptical ; the peris- 
tomie is very oblique. 
Measurements . — 
Diameter of tube 
Length of tube__ 
Diameter of peristome 
Length - of peristomie- 
0.20 mm. 
0.56 mm. 
0.12 mm. 
0.16 mm. 
O ccurrence. — Midwayan (Clayton limestone) : 
(very rare). 
Iioiotype. — Cat. No. 65248, U.S.N.M. 
Well at Brundidge, Alabama 
STOMATOPORA PARVIPORA, new species. 
Plate 131, figs. S, 9. 
Description— The zoarium incrusts oysters and other shells. The tubes are 
cylindrical, very small , striated transversal^ ; the protoecium is orbicular. The 
peristome is thin, salient, oblique, round, or elliptical; the peristomie is short. 
I Diameter of tube 0.1L-0.18 mm. 
Measurements. — • Length of tube 0.40-0.50 mm. 
[ Diameter of peristome 0.12-0.14 mm. 
Occurrence . — Lower Jacksonian (Moodvs marl) : Jackson, Mississippi (very 
rare). 
Middle Jacksonian (Castle Ilayne limestone) : Wilmington, North Carolina 
(rare). 
Vicksburgian (“Chimney rock” member of Marianna limestone): One mile 
north of Monroeville, Alabama (very rare). 
Cotypes.— Cat. Nos. 65361, 65362, U.S.N.M. 
