NORTH AMERICAN EARLY TERTIARY BRYOZOA. 103 



CUPULADRIA, new genus. 



No ovicell. The zoarium bears vibracula. No gymnocyst, 



Genotype. Cupuladna- (''ii/nt/in-ia} canariensis Busk, 1859. 



Range. Miocene-Recent. 



The genotype does not belong at all to the genus Cupularia, as we now under- 

 stand the genus, and as it is denned by its type species. There are neither opesiules 

 nor cryptocyst. Previously Sinitt, in 1872, classified the genotype more correctly in 

 Membranipora, as this genus was then understood. It can not, however, be main- 

 tained in this genus, since its significance has been more restricted. We have there- 

 fore been obliged to create a new genus, characterized by the presence of vibracula, 

 although these organs of zoarial adaptation may not logically furnish good generic 

 characters. We only add a letter to the primitive term to modify the long synonymy 

 of this species as little as possible. 



This genus differs from Heliodoma Calvet, 1907, in the absence of a gymno- 

 cyst. The absence of an endozooecial ovicell does not permit it to be confused with 

 either VibracelHna Canu and Bassler, 1917, or Setosellina Calvet, 1907. 



Genus TROCHOPORA D'Orbigny, 1851. 



1851. Trochopora D'OBBIGNY, Paleontologie frangaise, Terrain Cretace, Bryozoaires, vol. 5, 

 p. 506. 



The zoarium has the Lunulites form. The zooecia and the vibracula are 

 arranged in distinct rows. The ancestrular zooecia are either hydrostatic or radicu- 

 lar. The growth of the zoarium is effected by superimposed (unizooecial) disks 

 with the zooecia arranged in single rows. No ovicell. The vibracula are sym- 

 metrical. 



Genotype. Trochopora conica Defrance, 1833. 



Range. Lutetian-Helvetian. 



The known species of this genus are as follows : 



Trochopora conica Defrance, 1833. 



Trochopora ovalis D'Orbigny, 1851. 



Trochopora subplena Keuss, 1855. 



TROCHOPORA BOUEI Lea, 1833. 



Plate 10, figs. 1-17. 



1833. Lunulites fioi/ei LEA, Contributions to Geology, p. 189, pi. 6. 



1833. Lunulites duclosii LEA, Contributions to Geology, p. 190, pi. 6, fig. 203. 



1862. Discoflustrellaria bouei GABB and HORN, Monograph of the Fossil Polyzoa of the 

 Secondary and Tertiary formations of North America, Journal of the Academy of 

 Natural Sciences of Philadelphia, ser. 2, vol. 5, p. 154. 



1862. Hetcractis duclosii GABB and HORN, Monograph of the Fossil Polyzoa of the Second- 

 ary and Tertiary formations of North America, Journal Academy of Natural 

 Sciences of Philadelphia, ser. 2, vol. 5, p. 156, pi. 20, fig. 39. 



1S90. Lunulites (Discoflustrellaria) bond, and varieties concava, depressa, duclosii, tiza, 

 and almina. DE GREGORIO, Monographic cle la Faune Eocenique de 1'Alabama et 

 surtout de celle de Claimorne de 1'Etnge Perisien. Annales do Geologie et de Palonto- 

 logie, livraisons, 7. 8. p. 243, pis. 41, 42. 



