330 CRETACEOUS PALEONTOLOGY. 



1868. Flustrella capistraia Con., Cook's Geol. N. J., p. 723. 

 1905. Membrampora abortive Johns., Proc. Acad. Nat.. Sci. 

 Phil. 1905, p. 5. 



Description. Zoarium consisting of cylindrical branches about 

 .5 mm. in diameter, which sometimes bifurcate, and which rise 

 from a more or less irregular incrusting base. Zocecia arranged 

 in from six to eight vertical columns upon the cylindrical 

 branches, usually opposite in adjacent rows so as to form annu- 

 lar rows also; upon the expanded base the zocecia are irregularly 

 arranged. Each zocecium about .25 mm. in length, usually di- 

 vided into two portions, the aperture below, elliptical in outline, 

 surrounded by a raised border, about .15 mm. in length at the 

 summit of the border ; above the aperture is a smaller, depressed, 

 quadrangular or sub-crescentic area also surrounded by a raised 

 border, in some zocecia, perhaps in all when they are perfect, 

 this region is covered by a domeshaped wall to form an ovicell. 

 Avicularia small, equaling the zocecia in number, and placed in 

 the angles between them, surrounded by a raised border. Upon 

 the expanded basal portion of the zoarium the zooecia are irregu- 

 larly arranged, with the apertures more oval in outline, with the 

 avicularia less numerous and irregularly arranged. 



Remarks. The basal expansions of this species were originally 

 described as a distinct species under the name Membranipora 

 abortiva G. & H., but the two supposed forms are evidently but 

 different parts of the colonies of a single species. 



Formation and locality. Vincentown limesand, Vincentown 

 (154). Timber Creek and near Mullica Hill (Gabb and Horn). 



Geographic distribution. New Jersey. 



Genus ONYCHOCEU,A Jullien. 



Onychocella digitata (Morton). 



Plate XXIII:, Figs. 7-10. 

 1834. Eschar a digitata Mort., Synop. Org. Rem. Cret. Gr. U. 



S., p. 79, pl. 13, %. 8. 



. 1845. Eschar a digitata Lons., Quart. Jour. Geol. Soc. Lond., 

 vol. i, p. 73, figs, c, d, g, ( ?a, b), (not e, f). 



