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. 
Occurrence . — Middle Jacksonian; Rich Hill, 51 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- 
shall ville, 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) ; 
31 miles north of Grovania, Georgia (very common) ; 11 miles southeast of Lily, 
Dooly County, Georgia (very rare). 
Jacksonian (Zeuglodon zone) : Shubuta, Mississippi (rare). 
Upper Jacksonian (Ocala limestone) : West bank Sepulga River, Escambia 
County, Alabama (common). 
Lower Jacksonian (Moodys marl): Jackson, Mississippi (common). 
Cotypes.- — Cat. Nos. 65346-65350, U.S.N.M. 
IDMONEA MILNEANA D’Orbigny, 1839. 
Plate 136, figs. 1-12. 
1S39. Idmonea milneana D'Orbigny, Voyage dans l’Amerique meridionale, vol. 5, pt. 4, 
p. 20, pi. 9, figs. 17-21. 
1850-1852. Idmonea milneana D’Orbigny, Paleontologie frangaise, Terrain CrCtace, vol. 5, 
Bryozoaires, p. 732. 
1860. Idmonea milneana Busk, Note on the fossil Polyzoa collected near Mount Gambier, 
South Australia, Quarterly Journal Geological Society, London, vol. 16, p. 261. 
1864. Idmonea milneana Stoliczka, Foesile Bryozoen aus dem Tertiaren Griinsandsteine 
der Orakei-Bay bei Aukland, Reise der Oest. Fregatte Novara, geologiseher 
Theil, vol. 1, Abth. 2, Paleontologie, p. 114. 
1872. Idmonea milneana Smitt, Floridan Bryozoa, Kongl. Svenska Vetenskaps-Akad. 
Handl., p. 8, pi. 3, figs. 14-17. 
1875. Idmonea milneana Busk, Catalogue of marine Polyzoa in the collection of the 
British Museum, pt. 3, Cyclostomata, p. 12 . 
1877. Idmonea milneana Etheridge, Synopsis of the known species of Australian Tertiary 
Polyzoa, Journal Royal Society New South Wales, vol. 11, p. 13. 
1881. Idmonea milneana Ridley, 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 milneana Haswell, On the Cyelostomatous Polyzoa of Port Jackson and 
neighborhood, Proceedings of Linnean Society, New South Wales, vol. 4, p. 351. 
1882. Idmonea milneana McCoy, Bryozoa in McCoy’s Prodromus of the Zoology of Vic- 
toria, vol. 1, dec. 7, p. 29, pi. 68, fig. 1. 
1884. Idmonea milneana Waters, On fossil Cyelostomatous Bryozoa from Australia, Quar 
terly Journal of the Geological Society, London, vol. 40, p. 6S4. 
1884. Idmonea milneana Busk, Report on the Polyzoa collected by PI. M. S. Challenger, 
pt. 1, p. 13. 
1887. Idmonea milneana MacGillivray, Catalogue of the Marine Polyzoa of Victoria, 
Transactions and Proceedings of the Royal Society of Victoria, vol. 23, p. 287. 
