704 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
CRISIA HORNESI Reuss, 1847. 
Plate 141, figs. 1-4. 
1847. Crisia hornesi Reuss, Die fossilen Polyparien des Wiener Tertiarbeckens, Haidinger’s 
naturwissenschaftliclie Abliandlungen, pt. 2, Wien, p. 54, pi. 7, fig. 21 ; pi. 11, fig. 28. 
1847. Goelopliyma glabrum Reuss, Die fossilen Polyparien des Wiener Tertiarbeckens, 
Haidinger’s naturwissenscbaftliche Abhandlungen, pt. 2, p. 99, pi. 11, fig. 28. 
1866. Crisia hornesi Reuss, Die Foraminiferen, Aiitliozoen nnd Bryozoen des Deutscben 
Septa rientliones, Ein Beitrag zur fauna der mitteloligociinen Tertiarschichten, 
Denkschriften der k. Akad. der Wissenseli., Wien, vol. 25, p. 191 (75), pi. 11, fig. 12. 
1867. Crisia hornesi Reuss, Die fossile Fauna der Steinsalzablagerung von Wieliczka 
in Galizien, Sitzungsberichte der k. Akademie der Wissenschaften, Wien, vol. 55, 
Abtheil. 4, p. 121, no. 30. 
1S77. Crisia hornesi ( Reuss) Manzoni, I Briozoi fossiii del Miocene d’ Austria ed Ungheria, 
Denkschriften der k. Akad. der Wissenseli., Wien, vol. 25, p. 191 (75), pi. 11, fig. 12; 
pt. 2, vol. 37, p. 4, pi. 1, fig. 3. 
1889. Crisia hornesi Terrigi, I Macco di Palo, p. 104, pi. 2, fig. 5 (fide Neviani). 
1900. Crisia hornesi Neviani, Bryozoi Terziari e Posterziari della Toscana, Bolletino d. 
Society Geologica italiana, vol. 19, p. 27. 
1900. Crisia hornesi Neviani, Briozoi neogenici della Calabrie, Paleontograplia italiana, 
vol. 6, p. 224 (110) (local bibliography). 
1891. Crisia hornesi Neviani, Contribuzione alia conoscenza dei briozoi fossiii italiani, 
Briozoi postpliocenici del sottosuolo di Livorno, Bolletino della Soeieta geologica 
italiana, vol. 10, p. 131 (35) pi. 4, fig. 3. 
1896. Crisia hornesi Neviani, Briozoi neozoici di alcune localita d’italia, Bolletino della 
Soeieta Romana per gli Studi Zoologici, pt. 3, vol. 5, p. 123 ( 22). 
1909. Crisia hornesi Canu, Bryozoaire des terrains tertiaires des environs de Paris, 
Annales Paleontologie, vol. 4, p. 103, pi. 12, fig. 12. 
! Distance between the apertures 0.24-0.30 nun. 
Measurements . — Width of the zooecium and of the peristome- 0.06-0.08 mm. 
I Width of segments 0.30 mm. 
The ovicell is very salient, somewhat pyriform. The oeciopore is placed in the 
vicinity of the zoarium and the oeciostome is not salient. It is similar to that of 
Crisia denticulata Lamarck, 1812, 1 in which the measurements are also almost 
identical. 
Affinities . — This species differs from Crisia denticulata Lamarck, 1812, in 
having 16 or 17 tubes to the segments (in place of 11) and in the interapertural 
distance less or equal to the zoarial width, but never greater. 
It differs from Crisia cribraria Stimpson, 1853, in a lesser number (17 or 18) of 
tubes on the segments. 
It differs from Crisia lowei in its larger zooecial dimensions (0.08 and never 
0.06 mm.). 
1 Crisia elongate Harmer, 1915, to which that author adds Crisia denticulata Waters, 1910, is not the 
Crisia elongata Lamarck, 1812. The micrometric measurements given are slightly less than those of Crisia 
denticulata as Milne-Edwards who figured Lamarck’s type wrote in 1838 : “ Elle ressemble heaucoup a la 
Crisie dentele4, mais s'en distingue par ses branches plus grilles, ses cellules tubuleuses heaucoup plus 
petites et par la longueur considerable des espaces comprises entre deux etrauglements ou articulations 
(=segments) ; le nombre des individees dont se compose une de ees portions du polypier s’61ev6 ici 3 
environ vingt. . . The figure of Milne-Edwards, magnified 24 diameters, is excellent and gives rise 
to no confusion. The species of Harmer- Waters must therefore be determined anew. 
