10 PROCEEDINGS OF THE NATIONAL MUSEUM vol.69 



toward the apex. The ovicell is a special interzooecial cavity and 

 is closed by the operculum. 



We believe that the genera of the old family, Conescharellinidae, 

 can be separated into two groups. The first is one rich in species 

 with very frequent ovicells; the second comprises the species with 

 very rare ovicells. It is very difficult to conceive that their larvae 

 are identical. Moreover, Conescharellina with its distal sinus and 

 its inferior aperture is certainly of very different anatomical 

 structure. 



The genera of this family are Mamillofora Smitt, 1872, Fedora 

 Jullien, 1881, Anoteropora, new genus and Stenosi'pora^ new genus. 



According to Waters, 1919, it is necessary to class with Mamillo- 

 pora the ancient genera Discoflustrellarm D'Orbigny, 1852 (part) ; 

 Kionidella Koschinski, 1875, and Prattia D'Archiac, 1847. 



Genus ANOTEROPORA, new genus 



Greek : anoteros, superior ; poros, pore, referring to the place of the avi- 

 cularium. 



The zoarium is cupuliform. The inferior side of each zooecium 

 is porous. The superior side is convex, perforated proximally by 

 the apertura and decorated distally by a triangular avicularium 

 arranged transversely. The aperture is elliptical with two sub- 

 median cardelles. The ovicelled zooecia are much larger and their 

 aperture is transverse ; the ovicell is very large, occupying the place 

 of a zooecium and closed by the operculum. 



Genotype. — Anoteropora magnicapitata new species. (PI. 1, 

 fig. 11.) 



Range. — Pliocene. Recent. 



Genus STENOSIPORA, new genus 



The zoarium is cupuliform. The inferior base of each zooecium 

 is hexagonal and porous. The superior base is little convex, per- 

 forated in the middle by the aperture and often decorated laterally 

 by one or two avicularia. The aperture is elliptical with two car- 

 delles placed more or less low. The ovicell is hyperstomial, closed 

 by the operculum, embedded in the distal zooecium; the ovicelled 

 zooecia are no larger than the others. 



Genotype. — Stenosipora {Stichoporina) protecta Koschinsky, 1885. 



Range. — Eocene (Lutetian, Priabonian). 



Family CONESCHARELLINIDAE Levinsen, 1909 



The zooecia are prismatic, hexagonal, and rising above two hex- 

 agonal pyramids attenuated or potential. The aperture has a distal 

 sinus and is accompanied by a proximal pore. The colonies are free 

 and floating:. 



