NORTH AMERICAN EARLY TERTIARY BRYOZOA. 773 



from the basal lamella and branch almost immediately (fig. 12). The zooecial 

 walls appear hollow (fig. 13) ; there are small diaphragms visible here and there. 



On account of its size this species is easy to determine. It characterizes the 

 Jacksonian in America. 



Occwrence. Middle Jacksonian ; Rich Hill, 5-J miles southeast of Knoxville, 

 Crawford County, Georgia (very common) ; one-half mile southeast of Georgia 

 Kaolin Co. mine, Twiggs County, Georgia (common) : 12 miles southeast of Mar- 

 shallvillc, Georgia (very common) ; Eutaw Springs, South Carolina (very rare) ; 

 Baldock, Barnwell County, South Carolina (rare) ; 17 miles northeast of Haw- 

 kinsville, Georgia (common) ; 3J miles south of Perry, Georgia (very common) ; 

 3 miles north of Grovania, Georgia (very common) ; li miles southeast of Lily, 

 Dooly County, Georgia (very rare). 



Jacksonian (Zeuglodon zone) : Shubuta, Mississippi (rare). 



Upper Jacksonian (Ocala limestone) : West bank Sepulga Eiver, Escambia 

 County, Alabama (common). 



Lower Jacksonian (Moodys marl): Jackson, Mississippi (common). 



Cotypes.Cnt. Nos. 65346-65350. U.S.N.M. 



IDMONEA MILNEANA D'Orbigny, 1839. 

 Plate 136, figs. 1-12. 



1839. Idmonen miineana D'ORBIGNY, Voyage dans 1'Anierique mtridionale, vol. 5, pt. 4, 



p. 20, pi. 9, figs. 17-21. 

 1850-1852. Idmonea milncana D'ORBIGNY, Paleontologle frarigaise, Terrain CrStace, vol. 5, 



Bryozoaires, p. 732. 

 I860. Idmonea miineana BUSK, Note on the fossil Polyzoa collected near Mount Gambler, 



South Australia, Quarterly Journal Geological Society, London, vol. 16, p. 261. 

 1864. Idmoneti miineana STOLICZKA, Fossile Bryozoen aus dem Tertiilren Griinsandsteine 



der Orakei-Bay bei Aukland. Reise der Oest. Fregatte Novara, geologischer 



Theil, vol. 1, Abth. 2. Paleontologie, p. 114. 

 1872. Idmonea, miineana SMITT, Floridan Bryozoa, Kongl. Svenska Vetenskaps-Akad. 



Handl., p. 8, pi. 3, figs. 14-17. 

 1875. Idmonea miineana BUSK, Catalogue of marine Polyzoa in the collection of the 



British Museum, pt. 3, Cyclostomata, p. 12 . 

 1S77. Idmonea miineana ETHEBIDGE, Synopsis of the known species of Australian Tertiary 



Polyzoa, Journal Royal Society New South Wales, vol. 11, p. 13. 



1881. Idmonea miineana RIDLICY. Account of the zoological collections made during the 



Survey of H. M. S. Alert in the Straits of Magellan and on the coast of Patagonia, 

 Polyzoa, Proceedings of Zoological Society of London, p. 56. 



1882 Idmonea miineana HASWELL, On the Cyclostomatous Polyzoa of Port Jackson and 

 neighborhood, Proceedings of Linnean Society, New South Wales, vol. 4, p. 351. 



1882. Idmonea miineana McCoY, Bryozoa in McCoy's Prodromus of the Zoology of Vic- 



toria, vol. 1, dec. 7, p. 29. pi. 68. fig. 1. 

 1884. Idmonea miineana WATERS, On fossil Cyclostomatous Bryozoa from Australia, Quar 



terly Journal of the Geological Society, London, vol. 40, p. 684. 

 1884. Idmonea miineana BUSK, Report on the Polyzoa collected by H. M. S. Challenger, 



pt. 1, p. 13. 

 1887. Idmonea miineana MACGILLIVKAY, Catalogue of the Marine Polyzoa of Victoria, 



Transactions and Proceedings of the Royal Society of Victoria, vol. 23, p. 287. 



