NORTH AMERICAN LATER TERTJARY 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 im:ibo very salient, but 



their frontal is buried. 



,, , i ^ f7ia = 0.15mm. 



Measurements.— ApeTiuT&i , „ , „ 



^ [te = 0.1/ mm. 



Affinities. — This species is quite easy to recognize by its lanceolate avicularia 

 and its small zoarial lamellae. It differs from ScMsmopora ahrupta in the absence 

 of small triangular avicularia. 



Occurrence. — Pleistocene: Santa Monica (Rustic Canyon), California (rare). 

 Cotypes.— Cut. 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 cyhndrical 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. 



,, ^ . i f^a = 0.15 mm. 



Measurements. — Apertura , „ , „ 



^ I ta = 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 fossihzation. This species differs from Costazzia costazzi Audouin, 1828, 

 figured by Miss Robertson and still living in the Califomian 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.—C&t. No. 68714, U.S.N.M. 



Genus TEGMINULA Jullien, 1882. 

 1882. Tegminula Jullien, Dragages du Traiailleur, Bryozoaires, IJulletin Soci6t6 Zoologique de 

 France, vol. 7, p. 510. 

 Zooecia urceolate, standing erect irregularly one by the side of anotlier; orifice 

 absolutely circular, surmounted by a tubular peristome partly open in front. (Trans- 

 lation after Jullien.) 



Genotype. — Tegminula venusta Jullien, 1882. Recent. 



