NORTH AMERICAN EARLY TERTIARY BRYOZOA. 



603 



Genus COSTAZZIA Neviani, 1895. 



1895. Costazzia NEVIANI, Briozoi ueozoiei ill alcune localita d'ltalia, Bolletino Societii 

 lioman.i per gli Studi /oolcifjirji, pt. 2, vol. 4, p. 235 (sep. 11) ; Synonyms Lagenipora 

 WATKRS, 1S99-1913 : fSiniopclta LEVINSEN, 1909 1 . 



"The ovicell at the side of the peristome has a flat area and pores round the 

 border" (Waters). " I zoeci, acervulati, hanno la frontal molto rigonfia. variamente 

 perforata ed ornata da leggere costule ; 1'apertnra zoeciale subtrigona con labbro 

 calloso: grand! aviculari scafoidi sono sparsi fra i zoeci." (Neviani.) 14 tentacles. 



Genotype. Costuzzia (CeUepora) costassii Savigny-Audouin, 1826. 



Range- -Yicksburgian Recent. 



Historical. Waters, under the name of Lagenipora, and Levinsen, under the 

 name of Siniopelta, designated an assemblage of identical forms appearing to con- 



Coaiazzla Ignota Norman 



G> 



Coalazzia lucida Blncko 



C. tuDulosa FlncV.s 



o?loz:la coolata MacCilllvray 



FIG. ISO. Genus Costazzia Neviani, 1895. 



A-C. Costaxzia costazzii Audouin, 1826. A, B. Ordinary zooecia and ovicells, X 30. (After 

 Hiucks, 1SSO.) C. Operculuui and avicularian mandible. (Aiter Busk, 1884.) 



D-G. Opercula and avicularian mandibles. D. Costaxxla tubiilosa Hincks, 1880. (After 

 Busk, 1884.) K. C. ignota Norman, 1909. (After Norman, 1909.) P. 0. costata MacGillivray, 

 1868. (After MacGillivray, 1868, and Waters, 1885.) G. C. Incida Hincks, 1884. (After Waters, 

 1899.) 



stitute a rather natural genus. However, the type itself of Lagenipora sociolis 

 Hincks, 1880, is not comprised in the list given by Levinsen. and he himself classed 

 it in Schismopora. Considering that the zooecia of Lagenipora soc/ialis are oriented 

 and by no means cumulate, we have maintained the genus of Hincks with its primi- 

 tive definition in the family of Phylactellidae. For the genus Siniopelta Levinsen, 

 1909, we substituted the genus Costazzia Neviani, 1895, which has priority. Never- 

 theless, the definition given by the Italian author is incomplete and the acceptance 

 of this genus is questionable. The frontal area of the ovicell does not correspond 

 to a distinct function. Under our system of classification we can not admit this 

 genus. Most of the species must be put in Schizmopora. The following species 

 is described under Costazzia to call attention to this type of structure in American 

 strata. 



