Measurements. 



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. 



Diameter of the peristomes 0.12 mm. 



Distance between the peristomes 0.50 mm. 



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). 



Hol-otype.G&i. No. 65251, U.S.N.M. 



BERENICEA UNDATA, new species. 



Plate 105, fig. 12. 



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. 



Measurements. 



Distance between the peristomes 0.50 mm. 



Separation of the peristomes 0.32-0.36 mm. 



Affinities. This species differs from Diaperoecia mgosa, new species, in its 

 much smaller and less salient overlapping undulations. 



Occurrence. Midwayan (Clayton limestone) : Luverne, Crenshaw County, 

 Alabama (very rare). 



Holotype.CsA. 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. 



Measurements. . Distance between the peristomes 0.08mm. 



Separation of the peristomes 0.12 mm. 



Occurrence. Midwayan (Clayton limestone) : Luverne, Crenshaw County, 

 Alabama (very rare). 



Holotype.C&t. No. 65419, U.S.N.M. 



