Measurements. 



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. 



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). 

 Holotype.Czt. 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. 



Maximum width of zoarium 0.68 mm. 



Length of tube 0.55 mm. 



Diameter of peristome 0.12 mm. 



Occurrence. Middle Jacksonian: Wilmington, North Carolina (rare); 18 

 miles west of Wrightsville, Johnson County, Georgia (very rare) ; 3^ 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 Eiver, Escambia County, Alabama (rare). 

 Holotype.CnA. No. 65284, U.S.N.M. . 



PROBOSCINA STRIATIJLA, 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. 



Maximum width of zoarium 0.60 mm. 



Measurements. Length of tube 0.70-0.80 mm. 



Diameter of peristome 0.16 mm. 



Measurements. 



