MOLLUSCOIDEA. 341 



1862. Pliophloea sagena G. & H., Jour. Acad. Nat. Sci. Phil., 



2nd ser., vol. 5, p. 150, pi. 20, fig. 34. 

 1864 Pliophlcea ^-ffl^ma Meek, Check List Inv. Foss. N. A., Cret. 



and Jur., p. 3. 

 1868. Pliophlcea sagena Con., Cook's Geol. N. J., p. 722. 

 1905. Pliophlcea sagena Johns., Proc. Acad. Nat. Sci. Phil., 



1905. P- 5- 



Description. — Zoarium consisting of rather broad, irregularly- 

 branching, more or less tortuous plates composed of several layers 

 of zooecia superimposed one upon the other. Zooecia in close con- 

 tact all around, elongate-subelliptical or subquadrangular in out- 

 line; from 0.3 mm. to 0.4 mm. in length, the width usually about 

 one-half the length, arranged more or less regularly in longi- 

 tudinal lines and in quincunx. Zooecial apertures terminal, small, 

 o. I mm. or less in diameter, subcircular or subquadrate in outline ; 

 back of the aperture the outer surface of the zocecia is covered by 

 a thin, nearly flat or slightly convex wall, which is marked by 

 about 16 straight rows oi fine perforations, which extend inward 

 from and at right angles to the margin of the zooecium. Avicu- 

 laria small, subcircular or subelliptical in outline, two in number 

 for each zooecium, situated one on either side of the zooecial aper- 

 ture. Ovicells scattered irregularly over the surface of the 

 zoarium, usually not abundant; they are smooth, dome-shaped 

 bodies, considerably larger than the zooecial apertures just above 

 which they are always situated. 



Remarks. — ^Next to Onychocella digitata this is the commonest 

 species oi bryo'zo-an in the Vincentown fauna. It can be easily 

 recognized by its irregularly dividing and more or less twisted, 

 flabellate branches. 



Fommtion and locality. — Vincentown limesand, Vincentown 

 (154), Timber Creek and near MuUica Hill (Gabb and Horn). 



Geographic distribution., — ^New Jersey. 



Cribrilina immersa (Gabb & Horn). 

 1862. Bscharipora immersa G. & H., Jour. Acad. Nat. Sci. 



Phil, 2nd ser., vol. 5, p. 149. 

 1864. Bscharipora immersa Meek, Check List Inv. Foss. N. A., 



Cret. and Jur., p. 3. 



