82 BULLETIIS! 125, UNITED STATES NATIONAL MUSEUM. 



Canu), of Provence (Canu); Sicilian of Italy (Neviani); Quaternary of Italy (Segu- 

 enza), of Ai'gentina (Canu). 



Habitat. — Mediterranean; Atlantic, Canary Islands, and Florida. It is com- 

 mon in the Gulf of Gascony in the Miocene, but it has now disappeared from this 

 region. The species has been dredged at a depth of 1 1 to 48 meters in America and 

 from 81 to 113 meters at Madeira. 



Plesiotypes.—C&t. Nos. 68506-68511, U.S.N.M. 



CUPULARIA ROBERTSONIAE, new species. 



Plate 34, figs. 5-7. 



1908. Cupularia canariensis Robertson, The incrusting Cheilostomatoua Bryozoa of the West 

 Coast of North America, University of California Publications 11, Zoology, vol. 4, no. 5, 

 p. 314, pi. 24, figs. 90, 91. 



Description. — The zoarium is discoid, little convex. The zooecia are distinct, 

 much elongated, lozenge shaped; their mural rim is thin, sharp. The cryptocyst is 

 deep, flat, perforated in the middle by some irregular pores and laterally by seven 

 large opesiules; the opesium is ogival, transverse, with a proximal concave border. 

 The vibraculum is large, salient, auriform and provided with a very large opesium. 



,, ..AX (to = 0.10 mm. „ . fiz = 0.60 mm. 



Measurements. — Apertura , _,_ Zooecia, _ „„ „ „^ 



^ [Za =0.15 mm. [iz =0.30-0.35 mm. 



Affinities. — -The few fossil fragments in our collections appear to agree with 

 Cupularia canariensis Robertson, 1908, dredged in the Pacific oil the shores of 

 California. Tliis species is very close to Cupularia umhellata Defrance, 1828; but 

 differs in its larger and less numerous opesiules and in its smaller zoarium. It 

 differs from Cupularia reussiana Manzoni, 1869, in its more numerous and smaller 

 opesiules and in its flatter zoarium. 



Occurrence. — Pleistocene: Santa Monica (Long Wharf Canyon), California 

 (rare) . 



Habitat. — Pacific, off San Pedro (6 meters) and island of Santa Catalina, 

 California. 



Cotypes.—C&t. No. 68512, U.S.N.M. 



. Genus CALPENSIA JuUien, 1888. 

 1888. Calpensia Jullien, Mission scientifique du Cap Horn, VI, Zoologie, Bryozoaires, p. 78. 



The cryptocyst is entirely developed; it bears two distinct secondary opesia 

 [opesiules]. The operculum is semilunar. (After Jullien.) 



The opesiular outgrowths join the lateral walls, forming a closed hollow on each 

 side. A simple, feebly chitinized operculum. Numerous pores, but no spines. 

 No ovicell. No avicularia. The distal wall consists of a basal horizontal and a 

 frontal ascending part, the former being furnished with a narrow transverse group 

 of small uniporous rosette plates [ = septulae]. The distal half of each distal wall 

 with a single multiporous plate. (Levinsen.) 



Genotype.— Calpensia (Flustra) impressa Moll, 1803. Range: Auversian, 

 Recent. 



