NORTH AMERICAN LATER TERTIARY AND QUATERNARY BRYOZQA. 99 



Affinities. — This species differs from Schizoporella insculpta Hincks, 1883, only 

 in the absence of the oral armature of the rimule and in the absence of a furrow near 

 the apertura. The figured specimen is the only one that has been found; it lacks 

 the ovicell and we can not make any close comparisons. 



Occurrence. — -Pliocene (Waccamaw marl) : Waccamaw River, Horry County, 

 South Carolina (very rare) . 



Eolotype.— Cut. No. 68542, U.S.N.M. 



Genus LACERNA JuUien, 1888. 



(For description see Bulletin 106, V. S. \ational Museum, p. 345.) 



LACERNA MUCRONATA Smitt, 1872. 



Plate 16, fig. 2. 



1872. Hippothoa mucroneta Smitt, Floridan Bryozoa, pt. 2, Kongl. Svenska Vetenskaps-Akade- 

 miens Handlingar, vol. 11, no. 4, p. 45, pi. 8, fig. 169. 



Our determination of the American specimens is exact. We can observe on 

 our specimens the same costules, the six spines, the wide rimule and the complete 

 peristome indicated on Smitt's figure. 



Occurrence. — Miocene (Duplin marl): Wilmington, North Carolina (very rare). 



Habitat. — Florida (47 meters). 



Plesiotype.—Cat. No. 68543, U.S.N.M. 



Genus STEPHANOSELLA Canu and Bassler, 1917. 



(For description see Bulletin 106, U. S. National Museum, p. 343.) 

 STEPHANOSELLA BIAPERTA MIcheUn, 1842. 



Plate 16, figs. 4-9. 



Zoological bibliography. 



1889. Schizoporella biaperla Jelly, Synonymic Catalogue Recent Marine Bryozoa, p. 223 (bibliog- 

 raphy). 



1901. Schizoporella biaperla White.wes, Catalogue of the Marine Invertebrata of Eastern Canada, 

 Geological Survey of Canada, Bull. no. 722, p. 100. 



1907. Schizoporella biaperla Calvet, Expedition scientifique Travailleur et Talisman, p. 419 (bibli- 



ography). 



1908. Schizoporella biaperla Robertson, The Incrusting Chilostomatous Bryozoa of the West Coast 



of North America, University of California Publications, Zoology, vol. 4, p. 287, pi. 19, fig. 41. 



1909. Schizoporella biaperla Norman, The Polyzoa of Maderia and neighboring Islands, Journal 



Linnean Society London, Zoology, vol. 30, p. 303, pi. 40, figs. 3, 4 (var. divergens). 

 1912. Schizoporella biaperla Osburn, The Bryozoa of the Woods Hole Region, Bulletin Bureau 



Fisheries, vol. 30, p. 237, pi. 29, fig. 49. 

 1912. Schizoporella biaperla Guerin-Ganivet, Contributions a I'dtude des Bryozoaires des cotes 



Armoricaines, III, Bryozoaires de la region de Concarneau, Travaux scientifiques du 



Laboratoire de Zoologie de Concarneau, vol. 4, p. 13. 

 1912. Schizoporella biaperla Nordqaard, Campagne arctique de 1907, de Due d'Orleans, Bryozoaires 



p. 40. 

 1912. Schizoporella biaperla Barroso, Briozoos de la Estacion de Biologia maritima de Santander, 



Trabajos del Museo de Ciencias naturales, no. 5, p. 40. 

 1914. Schizoporella biaperla Osburn, The Bryozoa of the Tortugas Islands, Publication Carnegie 



Institution of Washington, no. 182, p. 207. 



