8 PROCEEDINGS OF THE NATIONAL. MUSEUM vol.69 



by radial costules. The cardelles are small. There are spines on 

 the peristome and zooecial avicularia in which the beak is always 

 oriented toward the top of the zooecia. 



Genotype. — Hippopleunfera {EscJiara) sedgwicki Milne-Edwards, 

 1838. 



Range. — Miocene ( Hel vetian ) — Recent. 



Genus BUFFONELLARIA, new genus 



The ovicell is hyperstomial and not closed by the operculum. The 

 frontal is an olocyst with vein-like markings. There is a small oral 

 avicularium. 



Genotype. — Hippothoa divergens Smitt, 1873. Recent. 



Family ADEONIDAE JuUien, 1903 

 Genus TRIPORULA, new genus 



The apertura is semicircular. The peristomice is elliptical and 

 transverse. The frontal is covered by stellate pores, each placed in 

 a polygonal area. There are three avicularia adjacent to the aper- 

 ture, two proximal with the beak oriented superiorily and one distal 

 with the beak oriented inferiorily. No spines. No ovicell. 



Genotype. — Triporula {Escharipora) stellata Smitt, 1873. 



Range. — Miocene. Recent. 



Family PHYLACTELLIDAE Canu and Bassler, 1917 

 Genus PSILOPSELLA, new genus 



Greek: psilos, unadorned, in allusion to the smooth frontal. 



The zooecia are large and surrounded by parietal dietellae; the 

 frontal is bordered with large areolar pores distinct from the 

 dietellae. The aperture is orbicular and buried at the bottom of 

 a long peristomie. 



Genotype. — PsUopsella uniseriata., new species. Recent. (PI. 1, 

 fig. 10.) 



Family CELLEPORIDAE Busk, 1852 

 Genus HIPPOPORIDRA, new genus 



The ovicell is hyperstomial and bears a frontal area. The zooecia 

 are accumulated; the frontal is surrounded by areolar pores and 

 often bears small avicularia. The aperture is formed of an anter 

 and a poster separated by two cardelles. The large interzooecial 

 avicularia are acuminated. 



Genotype. — Hippoporidra {GellepoTa) edax Busk, 1959. 



Range. — Miocene — Recent. 



