NORTH AMERICAN LATER TERTIARY AND QUATERNARY BRYOZOA. 
181 
SCHISMOPORA LANCEOLATA, new species. 
Plate 40, figs. 12-15. 
Description. —The zoarium formed of small lamellar masses creeps on algae. 
The zooecia are distinct, erect; the frontal is thick, convex, granular, and bears 
rarely some areolar pores; the medium umbo is terminated by a little salient avicu- 
larium. The apertura is semicircular; it bears a triangular sinus, wide and very 
short. The ovicell is wide, transverse, convex, smooth; it opens into the locella 
by a large orifice never closed by the operculum. The incomplete zooecia are 
very salient. The interzooecial avicularia are large, narrow, lanceolate; the pivot 
is formed by two denticles. The deep zooecia have their umbo very salient, but 
their frontal is buried. 
Measurements .—Apertura 
ha = 0.15 mm. 
la = 0.17 mm. 
Affinities. —This species is quite easy to recognize by its lanceolate avicularia 
and its small zoarial lamellae. It differs from Schismopora abrupta in the absence 
of small triangular avicularia. 
Occurrence. —Pleistocene: Santa Monica (Rustic Canyon), California (rare). 
Cotypes. —Cat. No. 68713, U.S.N.M. 
Genus COSTAZZIA Neviani, 1895. 
For description, see Bulletin 106, U. S. National Museum, p. 603. 
COSTAZZIA ROBERTSONIAE, new species. 
Plate 39, figs. 10-12. 
Description. —The zoarium is formed of small, globular or cylindrical masses 
attached to algae. The zooecia are erect, very salient; the frontal is finely porous. 
The apertura is pyriform; it bears a wide rimule of little depth. On the peristome 
there are two small avicularia. The ovicell is small, much embedded between the 
adjacent zooecia; it bears a small semicircular area, garnished with some large 
pores. The interzooecial avicularium is small, oval, with very wide beak; it is 
traversed by a complete pivot. 
= 0.15 mm. 
= 0.12 mm. 
Affinities. —The frontal is almost always smooth. Its small frontal pores are 
only visible on the perfectly preserved zooecia because they became very easily 
closed by fossilization. This species differs from Costazzia costazzi Audouin, 1828, 
figured by Miss Robertson and still living in the Californian waters, in its much 
smaller ovicell. 
We dedicate this species to Miss Alice Robertson, whose work on the Bryozoa 
of California has been a great addition to the science of bryozoology. 
Occurrence. —Pleistocene: Santa Monica (Rustic Canyon), California (rare). 
Cotypes. —Cat. No. 68714, U.S.N.M. 
Genus TEGMINULA Jullien, 1882. 
1882. Tegminula Jullien, Dragages du Travailleur, Bryozoaires, Bulletin Soci6t<§ Zoologique de 
France, vol. 7, p. 510. 
Zooecia urceolate, standing erect irregularly one by the side of another; orifice 
absolutely circular, surmounted by a tubular peristome partly open in front. (Trans¬ 
lation after Jullien.) 
Genotype .— Tegminula venusta Jullien, 1882. Recent. 
Measurements. —Apertura 
ha 
la 
