NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
663 
PROBOSCINA COLUBRA, new species. 
Plate 120, figs. 7, 8. 
Description. — The zoarium is triserial and incrusts shells and branched, linear 
or massive bryozoa. The tubes are little distinct, cylindrical, arranged in transverse 
irregular rows and with adjacent peristomes. The peristome is thin, orbicular, little 
salient. The zoaria with branches widened like the head of a snake are rather 
rare; generally they are linear. The peristomes of a transverse series are never 
all adjacent; there is always one isolated- At the base of the branch, the peristomes 
are arranged in quincunx. 
Maximum width of zoarium 0.80 mm. 
Measurements. — Length of tube 0.80-1.00 mm. 
Diameter of peristome 0.20 mm. 
Occurrence. — Middle Jacksonian, Wilmington, North Carolina (very rare) ; 
Eutaw Springs (rare), and near Lenuds Ferry, South Carolina (rare). 
Iiolotype. — Cat. No. 65280, U.S-N-M. 
PROBOSCINA CLAVATULA, new species. 
Plate 119, figs. 1, 2. 
Description. — The zoarium is multiserial, symmetrical on each side of the 
ancestrula, incrusting shells; the branches. are widened at their extremity in the 
form of a peg and commence with an isolated zooecium. The tubes are distinct, 
cylindrical, rather long. The peristome is round, oblique, salient, thin. 
I Maximum width of zoarium 0.68 mm. 
Measurements. — Length of tube 0.55 mm. 
1 Diameter of peristome 0.12 mm. 
Occurrence. — Middle Jacksonian: Wilmington, North Carolina (rare); 18 
miles west of Wrightsville, Johnson County, Georgia (very rare) ; 31 miles south 
of Perry, Georgia (very rare) ; Eutaw Springs (very rare) ; and near Lenuds 
Ferry, South Carolina (very rare). 
Upper Jacksonian: (Ocala limestone). Alachua, Florida (very rare); west 
bank Sepulga Fiver, Escambia County, Alabama (rare). 
Iiolotype. — Cat. No. 65284, U.S.N.M. 
PROBOSCINA STRIATULA, new species. 
Plate 119, figs. 5-8. 
Description . — The zoarium is triserial and incrusts shells and cheilostomatous 
bryozoa in short branches enlarging at each bifurcation. The tubes are distinct, 
arranged in quincunx, regular, finely striated transversally. The peristome is thin, 
round or elliptical, little salient. 
f Maximum width of zoarium 0.60 mm. 
Measurements . — Length of tube 0.70-0.80 mm. 
I Diameter of peristome 0.16 nun. 
