ART. 22. CYCLOSTOMATOUS BRYOZOA — CANU AND BASSLER. 37 



Genus CEA D'Orbigny, 1852. 



1852. Cea u'Obbigny, Paleontologie frangaise, Terrain C6tace. vol. 5, p. 

 1004. 



The oeciopore is a ver}' minute pore. Ciemmation is triparietal. 

 The tubes are club-shaped, oriented and without peristome: the ex- 

 tremity of the walls is dilated : a small oral tongue very irregularly 

 developed gives to the orihce a quite variable funnel-shaped form. 

 Genotype. — Cea rustlca D'Orbigny, 1852. Cretaceous. 

 The species belonging to this genus are : 



Cea 7mstica D'Orbigny, 1852 (pi. 6, figs. 1, 2.) 



Cea compressa D'Orbigny, 1852 ( = 6'. mhcoirvpressa Pergens, 



1885, and C. digitata D'Orbigny, 1852 (pi. G, figs. 3-9). 

 Cea lamellosa D'Orbigny, 1852 (pi. 6, fig. 10). 

 Cea tuberculata Canu, 1897. 



Cea {Filicea) reyularls D'Orbigny, 1852 (pi. 7, figs. 7-10). 

 Cea velata Ilagenow, 1839. 



Cea suhcompressa D'Orbigny, 1862 (pi. 6, figs. 12-14.) 

 Cea rhomhoidalis D'Orbigny, 1852. 

 Cea ohliqua D'Orbigny, 1852. 



Cea {Sem,icea) tuhulosa D'Orbigny, 1852 (pi. 6, fig. 11). 

 Cea {Semieea) lamellosa D'Orbigny, 1852. 



CEA SUBCOMPRESSA D'Orbign.v, 1853. 

 Plate 6, figs. 12-14. 



1853. Filicea suhcompressa D'Orbigny, Paleoutologie francaise, Terrain 

 GretacC. vol. 5, p. ]()01, pi. 786, figfj. 5, 7. 



We have been fortunate enough to discover two ovicelled speci- 

 mens of this species, which is not rare in France. The ovicell in 

 one is convex, but in the other is flat and embedded in the zoarium. 

 However, it is quite rare that the ovicells of the same species and 

 even of the same zoarium resemble each other exactly in size and 

 form. 



The oeciopore is very small. One of our specimens bears two oecio- 

 pores. The presence of these small pores is so constant that they 

 can scarcely be interpreted otherwise. 



The synonomy of this species is cited by Pergens in 1889 and by 

 (xregory in 1899. We have not enough data for comparison, and we 

 prefer simply to preserve D'Orbigny's name. 



Occurrence. — Cretaceous (Santonian) : Vendome (Loir-et-Cher), 

 France. 



Plesiotypes.—C^i. No. 68921, U.S.N.M. 



