28 BULLETIX 125, UNITED STATES NATIONAL MUSEUM. 



CONOPEUM BARBAREXSIS Gabb and Horn, 1862. , 



Plate 33, figs. 7-9. 



1862. Membranipora barbarensis Gabb and Horn, Monograph Polyzoa Secondary and Tertiary 

 formations of North America, Journal Academy Natural Sciences of Philadelphia, aer. 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. 



,, ^ r\ ■ f^o = 0.32 mm. „ • [i2 = 0.40mm. 



Measurements. — Opesiai, „,^ Zooeciai, „ „„ 



^ Uo = 0.16mm. [te = 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 Ellisina {Membranipora) levata Hincks, 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. —C&t. 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, Brj-ozoa, 

 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 

 cryiitocyst. 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 Heliodoma Calvet, 1907, in the absence of a gyimiocyst. 

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

 Vibracellina Canu and Bassler, 1917, or Setosellina Calvet, 1907. 



CUPULADKU 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. 



