NORTH AMERICAN LATER TERTIARY AND QUATERNARY BRYOZOA. 195 
Family MECYNOECIIDAE Canu, 1918. 
Forma ENTALOPHORA Lamouroux, 1821. 
(For remarks see Bulletin 106, U. S. National Museum, p. 734.) 
ENTALOPHORA FASCICULIFERA, new species. 
Plate 41, figs. 1-5. 
Description. —The zoarium is free, cylindrical, with the Entalophora form of 
growth. The tubes are long, distinct, separated by a furrow, convex, and slightly 
striated transversely; at their extremity they are bent almost perpendicularly 
to the zoarium and are prolonged in a long, free peristomie; they are sometimes 
bigeminate. The peristomes are thin and widened. 
Measurements: 
Diameter of the little salient peristomes.. 0.14 mm. 
Length of the peristomie.. 0.50 mm. 
Diameter of the peristome at the extremity of the long 
peristomies...._..0.20 mm. 
Diameter of the tubes on the zoarium,. 0.30 mm. 
Distance between the peristomes.... 1.00 mm. 
Diameter of the branches..... 0.80 mm. 
Affinities. —The characteristic of this species is furnished by the presence of 
small bundles formed of two tubes partially joined by their peristomie. The 
species differs from Mecynoecia proboscidea Milne-Edwards, 1838, in its smaller 
micrometric dimensions and in the frequent presence of bigeminate zooecia. 
Occurrence. —Pleistocene: Santa Monica (Tremochal Canyon) (rare), and 
Dead Mans Island, off San Pedro, California (very rare). 
Cotypes. —Cat. No. 68732, U.S.N.M. 
Family ONCOUSOECIIDAE Canu, 1918. 
Forma FILISPARSA D’Orbigny, 1853. 
FILISPARSA CLARKI, new species. 
Plate 41, figs. 11-19. 
Description. —The zoarium is free, compressed, bifurcated; the zooecia are 
placed on the anterior face; the dorsal is convex, striated longitudinally and trans- 
versally. The tubes are visible, convex, curved outward at their extremity and 
terminated by a rather long peristomie; the peristomes are thin, orbicular, arranged 
in quincunx or in oblique rows. 
Measurements: 
Diameter of the orifice.-.0.14 mm. 
Diameter of the peristome.. 0.18-0.20 mm. 
Zooecial diameter (on the zoarium).. . 0.24 mm. 
Distance between the peristomes.. 1.00 mm. 
Separation of the peristomes... 0.76-0.80 mm. 
