704 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



CRISIA HORNESI Reuss, 1847. 



Plate 141, figs. 1-A. 



1847. Crisia hornesi REUSS, Die fossilen Polyparien des Wiener Tertiarbeckens, Haidinger's 

 naturwissenschaftliche Abhandlungen, pt. 2, Wien, p. 54, pi. 7, fig. 21 ; pi. 11, fig. 23. 



1847. Coelophyma glabrum REUSS, Die fossilen Polyparien des Wiener Tertiiirbeckens. 

 Haidinger's naturwissenschaftliche Abbandluugen, pt. 2, p. 99, pi. 11, fig. 28. 



1866. Crisia hornesi REUSS, Die Foraruiniferen, Antbozoen und Bryozoen des Deutscben 



Septarientbones, Ein Beitrag zur fauna der mitteloligocanen Tertiarschichten. 

 Denkschriften der k. Akad. der Wissensch., Wien, vol. 25, p. 191 (75), pi. 11, fig. 12. 



1867. Crisia hornesi REUSS, Die fossile Fauna der Steinsalzablagerung von Wieliczka 



in Galizien, Sitzungsbericbte der k. Akademie der Wissenscbaften, Wien, vol. 55, 



Abtheil. 4, p. 121, no. 30. 

 1877. Crisia hornesi (Reuss) MANZONI, I Briozoi fossili del Miocene d' Austria ed Ungberia, 



Denkscbriften der k. Akad. der Wissensch., Wien, vol. 25, p. 191 (75), pi. 11, fig. 12; 



pt. 2, vol. 37, p. 4. pi. 1, fig. 3. 



1889. Crisia hornesi TEREIGI, 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 neogeuici della Calabrie, Paleontographa italiaua, 



vol. 6, p. 224 (110) (local bibliography). 

 1891. Crisia hornesi NEVIANI, Contribuzione alia conoscenza dei briozoi fossili italiani, 



Briozoi postpliocenici del sottosnolo di Livorno, Bolletino della Societa geologica 



italiana, vol. 10, p. 131 (35) pi. 4, fig. 3. 

 1896. Crisia hornefii NEVIANI, Briozoi neozoic! di alcune localita d'italia, Bolletino clella 



Societa 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 mm. 



Measurements- 



"Wiclth of the zooecium and of the peristome_ 0.06-0.08 mm. 



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 dentwulata 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 elongata 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 

 denticulate, as Milne-Edwards who figured Lamarck's type wrote in 1838 : " Elle ressemble beaucoup a la 

 Crisie dentele, mais s'eu distingue par ses branches plus greles, ses cellules tubuleuses beaucoup plus 

 petites et par la longueur considerable des espaces comprises entre deux etranglements ou articulations 

 (=segments) ; le nombre des individees dont se compose une de ces portions du polypier s'eleve lei a 

 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. 



