MOLLUSCOIDEA. 315 



Genus BERENICEA Lamark. 



Berenicea americana Ulrich and Bassler n. sp. 

 Plate XX., Fig. 7. 



Description. Zoarium incrusting, growing in more or less 

 irregular patches upon the surfaces of other bryozoa. Zocecia 

 contiguously arranged in more or less regular spreading series, 

 each zocecium about .5 mm. in length and from .1 mm. to .13 

 mm. in width, the lateral boundaries sharply defined by im- 

 pressed grooves, the surface gently convex transversely. Zocecial 

 apertures nearly terminal, circular, a little narrower than the 

 zocecia, directed slightly forward, with a slightly elevated rim- 

 like border. 



Remarks. This species cannot be confused with any associ- 

 ated bryozoan, the other American species of the genus being 

 mainly of Ordovician age. The species is particularly character- 

 ized by its small, narrow, elongate zocecia, with each zocecium 

 sharply marked laterally. 



Forma-tion and locality. Vincentown limesand, Vincentown 



(154). 



Geographic distribution. New Jersey. 



Genus DISCOSPARSA d'Orbigny. 



Discosparsa varians Ulrich. 

 Plate XXL, Figs. 1-2. 



1901. Discosparsa varians Ulrich, Md. Geol. Surv., Eocene, 

 p. 205, pi. 59, fig. 3. 



Description. "Zoarium forming subcircular (young) or 

 irregular, undulating expansions, 2 to 10 mm. wide, parasitically 

 attached, or more or less free and epithecated beneath. In young 

 colonies which are often spread over the original layer, the 

 zocecial apertures, which are enclosed by moderately elevated, 

 ring-like peristomes, are, sometimes uniserially, but never very 

 regularly, arranged in a radial manner about the small, de- 

 pressed and smooth central space. In older examples, there are 



