ART. 14 FOSSIL AITD RECENT BEYOZOA CANU AND BASSLER 113 



Family TUBUCELLARIIDAE Busk, 1884 



Genus TUBUCELLARIA D'Orbigny, 1852 



TUBUCELLARIA CEREOIDES Ellis and Solander, 1786 



Plate 15, Figure 6; Plate 33, Figure 7 



1907. Tubucellaria cereoides Waters, Tubucellaria: its species and ovicells. 

 Linnean Society's Journal Zoology, vol. 30, p. 129, pi. 15, figs. 8, 9, 

 15, 16. (Bibliography, geographic and geologic distribution.) 



1914. Tubucellaria cereoides Osburn, Bryozoa of the Tortugas [ -; t, i I s 

 Publication Carnegie Institution, Washington, No. 182, p. 203. 



1917. Tubucellaria cereoides Canu, Les Bryozoaires fossiles des terrains du' 

 Sud-Ouest de la France, XI, Rupelien. Bulletin Soci^te geologique 

 France (7 ser. 4), vol. 17, p. 357 (characteristics). 



This very cosmopolitan species lias not yet been discovered in the 

 western Atlantic on the American shores. Osburn, 1914, discovered 

 one segment at Tortugas. We have been fortunate to discover three 

 segments at Fowey Light. We give a photograph of one of them in 

 order to show that we are not deceived in our determination. 



The bushy zoaria of Tubucellaria cereoides are often attached to 

 algae and the depth at which the segments are found is not of very 

 great bathymetric value. 



Occurrence. — Fowey Light, 15 miles south of Miami, Fla. ; 40 fms. 

 Tortugas, 24 meters (Osburn) . 



Pliocene : Minnitimmi Creek, Bocas Island, Almirante 

 Bay, Panama. 

 Plesiotypes.— Cat. No. 7607, U.S.N.M. 



Family SMITTINIDAE Levinsen, 1909 



Genus CYSTISELLA Canu and Bassler, 1917 



CYSTISELLA AMERICANA, new species 



Plate 15, Figures 7, 8 



Description. — The zoarium is free and bilamellar. The zooecia are 



distinct, separated by a deep furrow, elongated, subcylidrical; the 



frontal is quite convex, smooth, entirely covered by the frontal avicu- 



larium which bears a large triangular callosity. The aperture is 



semicircular. The ovicell is globular, very fragile. The orifice of the 



avicularium is placed on the proximal border of the aperture and in 



a plane perpendicular to it. 



,, ^ A i lha = 0.10 mm. 



Measurements. — Aperture^, „._ 



^ [la = 0.12 mm. 



r, . lL2 = 0.80 mm. 



Z(00eCiai7 r> o/^ r> or 



ife = 0.30-0.35 mm. 

 58513—28 8 



