28 
BULLETIN 125, UNITED STATES NATIONAL MUSEUM. 
CONOPEUM BARBARENSIS Gabb and Horn. 1862. 
Plate 33, figs. 7-9. 
1862. Membranipora barbarensis Gabb and Horn - , Monograph Polvzoa Secondary and Tertiary 
formations of North America. Journal Academy Natural Sciences of Philadelphia, ser. 2, 
p. 60, pi. 20, fig. 47. 
Description. —The zoarium incrusts bryozoa. The zooecia are distinct, ir¬ 
regular, elliptical or oval; the mural rim is thin, flat, trenchant; the opesium is 
large, elliptical or oval. The axis of the avicularium is always in the axis of the 
proximal zooecium. 
,, , „ . \Jio = 0.32 mm. 
Measurements. —Opesia , _ , _ 
1 l/o = 0.16 
„ . 1 X 2 = 0.40 mm. 
mm. 1/2 = 0.28 mm. 
Affinities. —There are two muscular impressions as in the genus Conopeum. 
The avicularium (?) is not constant; it only appears from place to place; it is ellip¬ 
tical. We are not certain of its nature for only the figured specimens have been 
found. 
This species differs from EUisina ( Membranipora ) leva'ta Hindis. 1882, from 
the Queen Charlotte Islands, in its thinner mural rim, and in the avicularium, 
always placed in the axis of the proximal zooecium (and not in all directions). 
Occurrence. —Pleistocene: Santa Barbara, California (rare). 
Plesiotypes. —Cat. No. 68418, U.S.N.M. 
Genus CUPULADRIA Canu and Bassler, 1919. 
1919. Cupuladria Canu and Bassler, The Geology and Paleontology of the West Indies, Bryozoa, 
Publications Carnegie Institution of Washington, No. 291, p. 77. 
No ovicell. The zoarium bears vibracula. No gymnocyst. 
Genotype.—Cupuladria ( Cupularia ) canariensis Busk, 1859. Range: Miocene- 
Recent. 
The genotype does not belong at all to Cupularia as we now understand 
this genus and as it is defined by its type species. There are neither opesiules nor 
cryptocyst. Previously, Smitt 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 were there¬ 
fore obliged to create the 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 HeliodomaCalxet, 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, figs. 7-9. 
1859. Cupularia canariensis Busk, Monograph fossil Polyzoa of the Crag. Publications Paleonto- 
graphical Society, London, vol. 14, p. 87, pi. 13, fig. 2. 
