54 PROCEEDIXGS OF THE NATIONAL MUSEUM, vol.61. 



Genus CYRTOPORA Hagenow, 1851. 



1851. Cprtopora H.\genow, Die Bryozoen der Maastrichter Kreidebildung. 

 p. 21. 



The ovicell is an ovoid protuberance near the end of the zoarimn 

 (Gregory). The tubes are cylindrical short, with fasciculate per- 



Fio. 10. — Cyrtopora elegans Hagenow, 1851. 



A, B. Zoariuiu natural size and X 5. 



C. A portion more enlarged. (A-C, after Hagenow.) 



D. A small clavate zoarium, X 8, with slightly expanded base. 



E. Upper part of a zoarium, X 8, with the ovicell developed. 



F. G. Longitudinal and tran.sverse sections, X 14 and X IS. (D-G, after 

 Gregory.) 



H. Longitudinal .section, X K3, showing the cylindrical tubes with tripariotal 

 gemmation, arranged around a central bundle. 



I. Transverse section. X 16, The tubes of the central bundle are wider than 

 the adjacent ones. 



Cretaceous (Maastrichtian) : INfaastricht, Holland. 



istomes; the gemmation is triparietal around a central bundle 

 formed of three or four tubes. 



Genotype. — Cyrtopora elegans Hagenow, 1851. 



