AHT .21 CYCLOSTOMATOUS BRYOZOA — CANU AND BASSLER 9 



stomes are quite variable. The submedian contraction of the fronds 

 very well characterizes this species. 



Occurrence. — Lower Cretaceous (Aptian) : Faringdon, England. 



Holohjpe.— Cat. No. 69000, U.S.N.M. 



Forma BERENICEA Lamouroux, 1821 



BERENICEA FLABELLIFORMIS Roemer, 1839 



1839. Aulopora flabelliformis Roemer, Die Versteinerungen des Norddeutschen 



Oolithen-Gebirges, App., p. 15, pi. 17, fig. 4. 



1840. Rosacilla flabelliformis Roemeh, Die Versteinerungen der Norddeutschen 



Kreidegebirges, p. 19. 

 1863. Berenicea flabelliformis De Loriol, Les Invertebres du Neocomian inf^rieur 

 du Mont Saleve pres Geneve, p. 134, pi. 17, fig. 2. 



Measurements. — Diameter of orifice, 0.10 mm.; diameter of tubes, 

 0.18-0.20 mm. ; distance of peristomes, 0.60 mm.; separation of tubes, 

 0.60 mm. 



Affinities. — De Loriol's determination was based upon specimens 

 from Germany which still exist in the Museum of Geneva. The 

 type of De Loriol's figure bears transverse wrinkles. In its micro- 

 metric dimensions this is an intermediate species between Berenicea 

 gracilis Milne-Edwards, 1838, and Berenicea grandipora, new species. 



Occurrence. — Lower Cretaceous (Neocomian) : Mont-Saleve, near 

 Geneva and at Sainte-Croix (Vaud), Switzerland. 



Geological distribution. — Neocomian at Shoppenstadt, Hanover, 

 Germany (Roemer). 



Cat. No. 69838, U.S.N.M. 



BERENICEA GRACILIS Milne-Edwards, 1838 



1899. Berenicea gracilis Gregory, Catalogue of the Cretaceous Bryozoa in the 

 British Museum, p. 73. (Bibliography and geological distribution.) 



Measurements. — Diameter of orifice, 0.06-0.07 mm.; diameter of 

 tubes. 0.18 mm.; distance of orifices, 0.50-0.60 mm. 



Affinities. — From the bibliography given by Gregory it is necessary 

 to eliminate Aulopora Jlahelliformis Roemer, 1839, which is a much 

 larger species. 



Occurrence. — Lower Cretaceous (Valangian) : Sainte-Croix (Vaud), 

 Switzerland. 



Cat. No. 69839, U.S.N.M. 



BERENICEA CONFLUENS Reuss, 1846 



Plate 27, fig. 4 



1899. Berenicea confluens Gregory, Catalogue of the Cretaceous Bryozoa in the 

 British Museum, vol. 1, p. 110, pi. 5, fig. 4. (Bibliography and geolog- 

 ical distribution.) 



Affinities. — Our illustrated specimen resembles the one figured by 

 Gregory as a young zoarium which was obtained from the Albian at 

 Cambridge, England. The dimensions of the orifice, 0.10 mm., is in 



