78 GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



classified the genotype more correctly in Membranipora, as this genus 

 was then understood. It can not, however, be maintained in Mem- 

 branipora, since its significance has been more restricted. We have 

 therefore 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 

 gymnocyst. The absence of an endozooecial ovicell does not permit 

 it to be confused with either Vibracellina Canu and Bassler, 1917, or 

 Setosellina Calvet, 1907. 



Cupuladria canariensis Busk, 1859. 

 (Plate 1, Figures 8 to 10.) 



Cupularia canariensis Busk, Monograph fossil Polyzoa of the Crag, Publications Paleonto" 



graphical Society, London, XIV, p. 87, plate 13, fig. 2, 1859. 

 Membranipora canariensis Smitt, Floridan Bryozoa, collected by Count L. F. de Pourtales, 



Pt. I, Kongl. Svenska Vetenskaps-Akademiens Handlingar, X, No. 11, p. 10, 1872. 

 Cupularia canariensis Canu, Iconographie des Bryozoaires fossiles de L' Argentina, Premiere 



partie. Anales del Museo Nacional de Buenos Aires, tome XVII, p. 275, plate v 



figs. 8 to 10 (gives bibliography), 1908. 

 Cupularia guineensis Norman, The Polyzoa of Madeira and neighboring islands, Journal 



Linnean Society London, Zoology, XXX, p. 289, plate 37, figs. 2 and 6, 1909. 

 Cupularia canariensis Canu, Contributions a 1'etude des Bryozoaires fossiles, IV, Pliocene 



d'Alger, Bulletin Societe Geologique France (4), XIII, p. 124, 128, 1914. 

 Cupularia guiniensis Osburn, The Bryozoa of the Tortugas Islands, Florida, Carnegie Inst. 



Wash. Pub. No. 182, p. 194, 1914. 

 Cupularia canariensis Canu, Bryozoaires fossiles des Terraines du Sud-Ouest de la France, 



IX, Aquitanien, Bulletin de la Societe Geologique de France (4), XVI, p. 137, plate 



m, figs. 4 to 6. 



This species may be considered as equatorial. In spite of its geologic 

 extension, it has never left the tropical zone or its immediate latitudes. 

 Like Membranipora tuber culata Bosc, 1802, it appears to have been 

 carried to America by the equatorial current. It is comparatively 

 rare in our fossils and has never been found north of southern Florida. 



Occurrence. Lower Miocene (Bowden horizon), Bowden, Jamaica 

 (rare); Rio Gurabo, Rio Cana, and Cercado de Mao, Santo Domingo 

 (rare); lower Miocene (Gatun formation), Banana River, Costa Rica 

 (rare); Miocene (Choctawhatchee marl), Jackson Bluff, Ochlockonee 

 River, 25 miles southwest of Tallahassee, Florida (rare) ; upper Pliocene 

 (Caloosahatchee marl), Monroe County, Florida (rare). 



Geological distribution. Burdigalian of Bordeaux (collection Canu) ; 

 Helvetian of France (Canu) ; of Spain (De Angelis) ; Tortonian of 

 Austria-Hungary (Reuss); of Italy (Seguenza); Plaisancian of Italy 

 (Manzoni) ; of England (Busk) ; of Spain (De Angelis) ; of Algeria 

 (Canu); Astian of Italy (Neviani, Canu); Sicilian of Rhodes (Man- 

 zoni); of Italy (Neviani); Quaternary of Italy (Neviani), of Argentina 

 (Canu); Miocene of Australia? (Waters). 



