338 CRETACEGUS PALEONTOLOGY. 



Description. — Zoarium incrusting', composed of robust zooecia 

 about .5 mm. in length, frequently branching, one or two 

 branches being given off laterally or anteriorly from a single 

 zooecium at various angles. Zooecia pyriforra, strongly con- 

 vex towards the front, with thin, unornamented walls, very 

 narrow posteriorly, becoming rapidly wider anteriorly, in some 

 cases becoming nearly elliptical. Apertures large, subelliptical in 

 outline, situated anteriorly, sometimes bordered posteriorly by a 

 slightly-elevated lip. Ovicells often present. 



Remarks. — The colonies of this species have been usually ob- 

 served growing upon Onychocella digitata, and only in rare in- 

 stances are there more than 10 or 12 zooecia in one group. 



Formation and locality. — Vincentown limesand, Vincentown 

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



Geographic distribution.— New Jersey. 



Genus PIvANICEIvIaria d'Orbigny. 



Pianicellaria oculata d'Orbigny. 



Plate XXIV., Figs. 6-7. 



1850. Pianicellaria oculata d'Orbigny, Pal. Franc, Terr. 

 Cret. Tom., 5, p. 37, pi. 653, figs. 1-5. 



Description.- — Zoarium consisting of cylindrical branches 

 more or less subelliptical in cross-section, with from 8 to 10 

 longitudinal rows of zooecia. Zooecia arranged more or less reg- 

 ularly in quincunx, sharply separated, about 0.6 mm. in length. 

 Zooecial apertures small, elliptical in outline, about o.i mm. in 

 length, around the aperture of each zooecia is a rather broad, 

 slight!}' convex region extending to the zooecial margin, except 

 above, where there is a rather large ovicell. The ovicells upon 

 the narrower sides of the branches much larger than those upon 

 the broader and flatter sides. 



Formation and locality. — Vincentown limesand, Vincentown 



(154). 

 Geographic distribution. — New Jersey. 



