ART. 2: CYCLOSTOMATOUS BEYOZOA CANU AND BASSLER 67 



Geological distribution. — Lower Cretaceous (Cenomanian) : Le 

 Mans (Sarthe), France, Warminster, England, and Plauen, Germany. 



Plesiotype.— Cat. No. 69918, U.S.N.M. 



MELICERITITES, species undetermined 



Plate 12, figs. 13-15 



We have found two very curious specimens of Meliceritites, one 

 with all the facettes perforated and the other with some of them 

 perforated. These perforations are enigmatical. We believe the 

 specimen worthy of illustration, but we are unable to affirm that they 

 belong to a special species until a larger number of examples has been 

 collected. 



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



Cat. No. 69919, U.S.N.M. 



Subdivision Rectangulata 

 Family CERIOCAVIDAE Canu and Bassler, 1922 



Genus CERIOCAVA D'Orbigny, 1852 



(See Canu and Bassler, 1922, for definition) 



CERIOCAVA GRANDIPORA, new species 



Plate 9, figs. 14-17 



Description. — The zoarium is free, arborescent, formed of cylindri- 

 cal or compressed branches; the base is quite small, orbicular, non- 

 adherent to the substratum. The orifices are large, polygonal, 

 arranged in quincunx or in transverse rows. The ovicell is capsule- 

 shaped, deep, digitate, with an exterior concave and smooth surface. 



Measurements.- — -Diameter of orifice, 0.32-0.40 mm.; diameter of 

 large branches, 4 mm. 



Affinities. — This species is well characterized by the large size of its 

 orifices and by its digitate ovicell. In the Jurassic species the ovi- 

 cells are entire and nondigitate. 



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

 Switzerland (very rare) . 



Coty pes. —C&t. No. 69920, U.S.N.M. 



CERIOCAVA JUNCTATA, new species 



Plate 9, figs. 11-13 



Description. — The zoarium is hollow, cylindrical, formed of frag- 

 ments irregularly joined together or anastomosing; the branches are 

 s»lid, with the normal section. The orifices are elliptical, placed at 

 the bottom of a polygonal peristome; they are arranged in quincunx. 



