NORTH AMERICAN LATER TERTIARY ANn QUATERNARY BBYOZOA. 203 



Family LICHENOPORIDAE Smitt, 1866. 



Genus LICHENOPORA Defrance, 1823. 



(For description, see Bulletin 106, U. S. National Museum, p. 812.) 



LICHENOPORA CALIFORNICA Conrad, 1855. 



Plate 44, figs. 4-7. 



71S52. Unicavea californica D'Orbigxy, Paleontologie francaise. Terrains cr^tacds, vol. 5, Bryo- 



zoaires, p. 972. 

 1855. Lkhenopora californica Conrad, Note on Miocene and PostpUocene deposits of California, 



Proceedings Academy Natural Sciences Philadelphia, vol. 7, p. 441. 

 1910. Lichenopora californica Robertson, Cyclostomatous Bryozoa of the west coast of North 



America, University of California Publications, Zoology, vol. G, p. 261, pi. 25, figs. 48, 49 



(bibliography). 



Historical. — Unicavea californica is thus defined by D'Orbigny, 1852: "Espece 

 tres convexe endessus, ayant le centre excave, et pourrue de pores interm^diaires 

 ^nonnes. Madelaine, Basse Californie." Its classification in the genus Unicavea 

 indicates moreover that the colony is discoidal, creeping, incrusting, provided with 

 a single series of cellules in the rows. 



Waters, 190.5, « examined D'Orbigny's type preserved in the Museum of Paris. 

 He notes: "The zooecia are uniserial, slightly raised; zooecia and cancelli about 

 the same size. This does not seem to be the Discoporella californica of Busk." 



What Conrad, Gabb and Horn, Busk, and Robertson have named itc?ieriopora 

 californica does not appear therefore to be the species of D'Orbigny, as thezoarium 

 is free and the fascicles are biserial. Under these conditions we believe it necessary 

 to substitute the name of Conrad, 1855, for that of D'Orbigny. It is useless to 

 change the specific name, as the specimen of D'Orbigny has not been figured. 



Structure. — The structure of this species is quite constant. The zoarium is 

 free and very convex. The fascicles are regular and biserial. The cancelli are 

 very large and often wider than the tubes. The ovicell is placed in the center 

 of the zoarium and liidden by the cancelU. The oeciostome is large, orbicular, 

 sahent, placed excentrically in the vicinity of the fascicles. 



Occurrence. — Pleistocene: Santa Barbara, California (rare). > 



Plesiotypes.— Cat. Xo. 68751, U.S.N.M. 



LICHENOPORA HISPIDA Fleming, 1828. 



Plate 44, figs. 1-3. 



1828. Discopora hispida Fleming, History of British Animals, p. 530. 



1884. Lichenopora hispida Hincks, Polyzoa of Queen Charlotte Islands, Annals and Magazine 

 Natural Iiistor>-, ser. 5, vol. 13, p. 207. 



1889. Lichenopora hispida Jelly, A synonymic catalogue of marine Bryozoa, p. 134 (general bibli- 

 ography). 



1901. Lichenopora hispida Whiteaves, Catalogue of the marine invertebrate^>f eastern Canada, 

 Geological Sur\-ey of Canada, p. 112. 



1905. Lichenopora hispida Nevla.xi, Briozoi fossili de Carrubarc, Calabria, Bollettino della Societa 

 geologica italiana, vol. 23, p. 554 (52). 



• Notes on some Recent Bryozoa In D'Orbigny's collection, Annals and Magazine of Natural History, ser. 7, vol. 15, p. 15. 



