BEYOZOAN FAUNA OF VINCENTOWN LIMESAND 21 



Geological distribution. — Maastrichtian (Dordonian) : Royan, 

 France. 

 Plesiotype.— U.S.N.M. No. 73876. 



ALDERINA WELLERI, new species 



Plate 4, Figures 1, 2 



Description. — The zoarium encrusts the fragments of shells and 

 of C oscinopleura. The zooecia are distinct, separated by a deep 

 furrow, elongated, oval, sometimes with a small gymnocyst; the 

 mural rim is thin distally and much enlarged proximally. The 

 opesium is terminal, oval. The ovicell is hyperstomial, not closed by 

 the operculum, globular, smooth. Very rarely a small interzooecial 

 avicularium appears. There are one large distal septula and two 

 pairs of lateral septulae. 



Measurements. — 



„ _. . \Lz = 0.5-0.55 mm. ~ . \ho= 0.35-0.4 mm. 



Ordinary zooeciaK „ ot . nAt , Opesium{ 7 _ nK AO 



J ]fe = 0.35-0.45 mm. l \lo= 0.25-0.3 mm. 



Young zooecia \Lz = 0.6-0.75 mm. ~ . f A<?=0.4-0.5 mm. 



(marginal) jte=0.35-0.4 mm. u P esium J; = 0.3-0.35 mm. 



17-19 zooecia in 4 sq. mm. 



Variations. — The marginal zooecia are larger and their mural rim 

 is thinner. Their ovicells appear exteriorly to be closed by the 

 operculum but in inclining the preparation, one can see the mural 

 rim complete and not attenuated as in Alderina, which observation 

 is confirmed by dissection. The small very sporadic interzooecial 

 zooeciules are probably avicularia. Regenerated zooecia are not 

 rare. 



We have dedicated this species to the late Dr. Stuart Weller in 

 appreciation of his work upon the Cretaceous faunas of New Jersey. 



Occurrence. — Vincentown limesand : Rare at Vincentown, N.J., 

 and Noxontown Millpond, Del. 



Holotype.—U.S.'NM. No. 73875. 



Genus STAMENOCELLA Canu and Bassler, 1917 



STAMENOCELLA OCULATA Ulrich and Bassler, 1907 



Plate 3, Figures 5-9 ; Plate 15, Figure 9 



1862. Flustrella cylindrica Gabb and Horn, Journ. Acad. Nat. Sci. Philadelphia, 



ser. 2, vol. 5, p. 161, fig. 49. 

 1907. Planicellaria oculata Ulrich and Bassler, in Weller, Geol. Surv. New 



Jersey, Paleontology, vol. 4, p. 338, pi. 24, figs. 6, 7 (not D'Orbigny, 1852). 



Description. — The zoarium is free, radicelled, flabellate formed of 

 two lamellae placed back to back and inseparable, articulated, at- 

 tached to a chitinous stolon. There are 4 kinds of zooecia as 



