ART. 22. CYCLOSTOMATOUS BKYOZOA CANU AND BASSLER. 85 



Cretaceous (Cami^anian) : St. Medard, Brossac, and Piaud (Cha- 

 rente), France. 



Plesiotype.—C^i. No. 68936, U.S.N.M. 



MELICERITITES LAMELLOSA D'Orbigny, 1852. 



Plate 14, fig. 13. 



1852. Elea lamellosa d'Okbigny, Paleontologie fraiigaise, Terraiu Cretaces, 

 vol. 5, p. 632, pi. 625, figs. 11-15. 



1912. Meliceritites lamellosa Levinsen, Studies on the Cyclostomata Op- 

 erculata, Memoires Academie Royale Sciences et Lettres de Dane- 

 mark, ser. 7, vol. 10, p. 45, pi. 3, figs. 1-9 (bibliography). 



This species is quite common in France where it is best known 

 under the name given by D'Orbigny, Elea lamellosa^ its zoaria con- 

 sisting of exiDanded twisted fronds. We figure a splendid ovicell 

 giving a good idea of the regularity of these beautiful fossils. The 

 oeciopore is transverse and elliptical. 



Occurrence. — Cretaceous (Coniacian) : Fecamp (Seine inferi- 

 eure), Phelippeaux (Charente), Tours, Saint Paterne (Indre-et- 

 Loir), Villedieu and Lisle (Loir-et-Cher), France. 



Cretaceous (Santonian) : Coulommiers near Vendome and Romo- 

 nintin (Loir-et-Cher), France. 



Flesioty pes.— Csit No. 68937, U.S.N.M. 



MELICERITITES MAGNIFICA D'Orbigny. 1852. 



Plate 12. figs. 12-16. 



1852. Multelea magnlfica d'Oebigny Pale6ntologie fraugaise. Terrain Cre- 



tace, vol. 5, p. 649. 

 1912. Meliceritites magnifica Levinsen, Studies on the Cyclostomata Op- 



erculata, p. 20, pi. 1, figs. 3-10; pi. 7, figs. 13-19 (not synonymy). 



Under this name D'Orbigny has confounded three species, as is 

 well shown by his collection in the Museum of Natural Histor}' at 

 Paris. Nevertheless the name can be maintained for the figured 

 specimens which were obtained from the Coniacian of the Loire 

 A-^alley. The second species is M eliceritites arbiisculus Leymerie, 

 1841, a species badly figured, which Waters named Mdlcerims^ 

 royana in 1891. 



The ovicell is irregular in its general form; to the two variations 

 noted by Levinsen in 1912 we here add a third (fig. 14). Our sec- 

 tions confirm those of Hennig, of Gregory, 1899, and of Levinsen, 

 1912. We have still not been able to discover the origin of the 

 successive lamellae which form the large zoaria. 



Very common in the valley of the Loire, this species is rarer in 

 the Charentes. It characterizes the lower Senonian. 



