158 
BULLETIN 125, UNITED STATES NATIONAL MUSEUM. 
Family ADEONIDAE Jullien, 1903. 
Genus ADEONA (Lamouroux, 1816) Levinsen, 1909. 
(For description see Bulletin 106, U. S. National Museum, p. 560). 
ADEONA POROSA Canu and Bassler, 1919. 
Plate 6, figs. 22, 23. 
1919. Adeona porosa Canu and Bassler, Geology and Paleontology of the West Indies, Bryozoa, 
Publications of the Carnegie Institution of Washington, no. 291, p. 94, pi. 6, figs. 22, 23. 
Description. —The zoarium is free, bilamellar. The zooecia are little distinct, 
very elongate, separated by a hardly visible, salient thread; the frontal is porous, 
little convex, surrounded by areolar, parietal pores of which one is larger than 
the others. The ascopore is large, orbicular, median. The apertura and peristomice 
are semilunar with the proximal border somewhat concave. The gonoecia have 
two very large symmetrical, areolar pores and irregular, oral gibbosities. The 
avicularian zooecia have their opesia arranged on the lower part of a pyriform area, 
calcified and deep. 
J . |k = 0.12 mm. „ . f7.2 = 0.60 mm. 
Measurements. —Apertura \, . ,. Zooecia ( , . 
r (la-0.12mm. t (2=0.30 mm. 
Affinities. —As we possess only the figured fragment the study of this species 
is necessarily incomplete. The species is very peculiar, for there is no other one 
provided with a porous frontal and oral gibbosities at the gonoecia. 
Occurrence. —Lower Miocene (Bowden horizon): Cercado de Mao, Santo 
Domingo (rare). 
Cotypes. —Cat. No. 68669, U.S.N.M. 
ADEONA HECKELI Reuss, 1847. 
Plate 24, figs. 1, 2. 
1845. Cellepora umbilicata Lonsdale, Report Corals Tertiary formation North America, Quarterly 
Journal Geological Society, London, vol. 1, p. 507. 
1847. Cellepora heckeli Reuss, Die fossilen Polyparien des Wiener Tertiarbeckens, Haidinger’s 
naturwissenschaftliche Abhandlungen, vol. 2, p. 85, pi. 10, fig. 10. 
1849. Lepralia violacea Johnston, A History of the British Zoophytes, p. 325, pi. 57, fig. 9. 
1862. Multiporina umbilicata Gabb and Horn, Monograph of the fossil Polyzoa of the Secondary 
and Tertiary formations of North America, Journal Academy of Natural Sciences of Phila¬ 
delphia. ser. 2, vol. 5, p. 145, pi. 20, fig. 27. 
1880. Microporella violacea Hincks, History of the British Marine Polyzoa, p. 216, pi. 30, figs. 1-4. 
1889. Microporella heckeli Jelly, A synonymic catalogue of the recent marine Bryozoa, p. 184 
(general synonymy). 
1895. Microporella ( Hcckelia) violacea Nevlani, Briozoi fossili della Farnesina, Prfleontographia 
italica, vol. 1, p. 106, (30), pi. 5, (1), figs. 27-29. 
1900. Microporella heckeli Calvet, Contribution a l’Histoire naturelle des Bryozoaires ectoprocts 
marins, Travaux de l’lnstitut de Zoologie de l’Universite de Montpellier, mem. 8, pi. 7, 
fig. 1; pi. 8, fig. 15. 
1901. Microporella ( Heckelia) violacea Neviani, Briozoi neogenici della Calabrie, Paleontographia 
Italica, vol. 6, p. 177 (63), (local bibliography). 
1902. Microporella heckeli Calvet, Bryozoaires marins de la region de Cette, Travaux de l’lnstitut de 
Zoologie de l’Universite de Montpellier, vol. 2, mem. 11. p. 39. 
1902. Microporella heckeli Calvet, Bryozoaires des cotes de Corse, Travaux de l’Tnstitut de Zoologie 
de l’Universite de Montpellier, vol 2, mem. 12, p. 20. 
1904. Adeonellopsis umbilicata Ulrich and Bassler, Maryland Geological Survey, Miocene, p. 417, 
pi. 113, figs. 4, 5; pi. 114, fig. 5. 
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