BRYOZOAN FAUNA OF VINCENTOWN LIMESAND 35 



not note the onychocellarium. Our specific name recalls the close 

 specific affinity. 



The genus Floridhia still exists in the equatorial zone, and species 

 are found in the American and European Tertiary. It made its 

 appearance in Europe in the Senonian ; it is well represented in the 

 Maastrichtian and the Danian. 



Occurrence. — Vincentown limesand : Noxontown Millpond, Del. 

 (very rare). 



Holotype.— U.S.N.M. No. 73885. 



Genus MICROPORA Gray, 1848 



MICROPORA OGIVALINA, new species 



Plate 8, Figure 8 



Description. — The zoarium encrusts other Bryozoa. The zooecia 

 are distinct, united by their mural rim, little or not elongated, 

 ogival ; the mural rim is thin, salient, finely granular ; the cryptocyst 

 is large, shallow, almost flat, finely perforated and granulated. The 

 aperture is small, terminal, semielliptical, transverse. The opesiules 

 are linear, short, adjacent to the mural rim, placed above the trans- 

 verse axis of the zooecia. The apertural avicularium is small, oval, 

 with a pivot, oriented obliquely, the beak at the top. The ovicell 

 is endozooecial, large, convex, smooth. 



Measurements. — 



,, . (£3 = 0.45-0.54 mm. . [ha=0. 04-0. 05 mm. 



Zooecia], _ „_ _ , K Apertura 7 



\lz = 0. 36-0. 4o mm. e \la=0. 12 mm. 



21 zooecia in 4 sq. mm. 



Affinities. — The zooecial width is quite variable, this being one of 

 the characteristics of the genus. This is a typical Micropora very 

 close to the genotype Micropore/, coriacea Esper, from which it differs 

 only in the micrometric measurements. 



Occurrence. — Vincentown limesand : Very rare at Vincentown, 

 N.J., and Noxontown Millpond, Del. 



Holotype.— U.S.NM. No. 73891. 



MICROPORA PARVA, new species 

 Plate 8, Figure 4 



Description. — The zoarium encrusts the debris of shells. The 

 zooecia are distinct, united by their mural rims, elongated, oval ; the 

 mural rim is very thin, salient ; the cryptocyst is shallow, flat, finely 

 perforated; the opesiules are linear, more or less long, adjacent to 

 the mural rim. The aperture is small, terminal, semielliptical, 



