MOLLUSCOIDEA. 323 



-nearly flat or slightly convex and marked by transverse wrinkles 

 which curve convexly forward. The zocecia more or less irregu- 

 larly arranged, the apertures oiften showing a tendency to be 

 arranged in transverse or diagonal rows, about .2 mm. in diam- 

 •eter, the terminal portion of the zocecia free, cylindrical, inclined 

 forward, the -procumbent portion transversely rounded and 

 bounded laterally by longitudinal furrows upon the surface of 

 the zoarium. 



Remarks. — This species resembles P. contortiles, but is larger 

 with larger and fewer zocecia, and the branches less commonly 

 -<:;mstomosing. 



Formation and locality. — Vincentown limesand, Vincentown 



<I54)- 



Geographic distribution. — New Jersey. 



Family ENTALOPHORIDAE. 



Genus Entai^gphora Lamark. 



Entalophora conradi Gabb & Horn. 



Plate XXII., Fig. 9. 



1862. Hntalophora Conradii G. & H., Jour. Acad. Nat. Sci. 



Phil., 2d ser., vol. 5, p. 170, pi. 21, fig. 59. 

 1864. Bntaiophora Conradii Meek, Check List Inv. Foss. N. A., 



Cret. and Jur., p. 4. 

 1868. Bntaiophora Conradii Con., Cook's Geol. N. J., p. 723. 



Description. — Zoarium, consisting of small, cylindrical, some- 

 times bifurcating branches about .38 mm. in diameter. Zocecia 

 arranged in about 10 vertical rows, the apertures placed alter- 

 nately in adjacent rows so as to give them also a spiral arrange- 

 ment; the apertures subovate in outline, broadest and somewhat 

 truncate above, the upper margin slightly elevated as a project- 

 ing lip, the spaces between the apertures in the vertical rows 

 -slightly concave, about equaling the apertures themselves in 

 length. 



Remarks. — The type of this species seems to have been lost or 

 destroyed, as it is not mentioned in Johnson's list of types in the 

 collection of the Philadelphia Academy of Sciences, and the speci- 



