670 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
oblique, or raised vertically. The peristome is thick, orbicular, somewhat oblique. 
The ancestrula is very small, with an orbicular protoecium. 
1 Diameter of the peristomes 0.12 mm. 
, Distance between the peristomes 0.50 mm. 
Measurements . — ~ , . ' . .. 
separation of the peristomes 0.44 mm. 
Diameter of the zooecia 0.24-0.30 mm. 
The length of the tubes is extremely variable; it is even very difficult to find 
a place where the tubes are arranged in quincunx, permitting the exact measurement 
of their separation. 
Occurrence . — Midwayan (Clayton limestone) : One mile west of Fort Gaines, 
Georgia (very rare). 
Holotype.— Cat. No. 65251, U.S.N.M. 
BERENICEA UNDATA, new species. 
Plate 105, lig. V2. 
Description . — The zoarium is orbicular and incrusts shells ; the zone of growth 
is thick, but very narrow. The tubes are cylindrical, little distinct, little erect at 
the extremity; ornamented with small, overlapping wrinkles. The peristome is 
salient, thin, elliptical, elongate. 
( Diameter of the peristome 0.08-0.10 mm. 
Distance between the peristomes 0.50 mm. 
Separation of the peristomes 0.32-0.36 mm. 
Affinities . — This species differs from Diaperoecia rugose, new species, in its 
much smaller and less salient overlapping undulations. 
O ccurrence .- — Midwayan (Clayton limestone) : Luverne, Crenshaw County, 
Alabama (very rare). 
Holotype. — Cat. No. 65253, U.S.N.M. 
BERENICEA STIPATA, new species. 
Plate 106, figs. 1-2. 
Description . — The zoarium is irregularly orbicular ; the zone of growth is very 
narrow and thick. The tubes are cylindrical, indistinct, erect at the extremity, much 
crowded against each other. The peristome is thin, orbicular, very oblique. 
( Diameter of the peristome 0.14 mm. 
Distance between the peristomes 0.08 mm. 
Separation of the peristomes 0.12 mm. 
Occurrence . — Midwayan (Clayton limestone) : Luverne, Crenshaw County, 
Alabama (very rare). 
Holotype. — Cat. No. 65419, U.S.N.M. 
