ART. 14 CHEILOSTOMATOUS BRYOZOA — CANU AND BASSLER 11 



The known genera of this family are Fldbellopora D'Orbigny, 

 1852, ConescharelUna D'Orbigny, 1852, Trochosodon^ new genus, 

 Bipora Whitelegge, 1887, and Zeuglopora Maplestone, 1909. 



Genus TROCHOSODON, new genus 



Greek : troches, wheel ; odon, tooth, in allusion to the aspect of the base. 



The zooecia are not entirely covered and are separated by pores; 

 the base is crenulated by the last formed row of zooecia. Interzoo- 

 ecial pores are present. 



Genotype. — Trochosodon linearis^ new species. Recent. (PI. 1, fig. 



12.) 



This new genus differs from ConescharelUna in the absence of 

 avicularia, in convex instead of perfectly conical zoaria and in the 

 zooecia which present a visible portion. 



Family LEKYTHOPORIDAE Levinsen, 1909 



Genus ACTISECOS, new genus 



Greek : actis ray ; secos small case or cell, in reference to the radiated ar- 

 rangement of the zooecia. 



The zooecia are tubular, swollen at their base; the frontal is a 

 tremocyst with very small pores. The ovicell is peristomial and 

 placed on the dorsal. The aperture is ogival and buried at the bottom 

 of a long peristomie. The base of the zooecia is hexagonal. 



Genotype. — Actisecos regularis., new species. Recent. (PL 1, fig. 



13.) 



This genus very much resembles Ascosia Jullien, 1881, but differs 

 from it in having six cells around the ancestrula, in the absence of 

 oral avicularia and in the peristomial and not recumbent ovicells. 



Genus CATADYSIS, new genus 



Greek: catadysis, hiding place; in allusion to the ovicell. 



The ovicell is hyperstomial, buried in the interior of the zooecial 

 walls, opening in the inferior part of the peristomie. The zooecia 

 are indistinct; the frontal is striated longitudinally; the walls much 

 thickened, are formed by a tremocyst with very small tubules. The 

 apertura is hidden at the bottom of the peristomie and bears a prox- 

 imal tongue. In the peristomie there are very small triangular 

 avicularia. 



Genotype. — Catadysis {Schizoporella) challengeriana Waters, 1888. 

 Recent. 



