NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
603 
Genus COSTAZZIA Neviani, 1895. 
1895. Costazzia Neviani, Briozoi neozoici di alcune localita d’ltalia, Bolletino Societa 
Romana per gli Studi Zoologica, pt. 2, vol. 4, p. 235 (sep. 11) ; Synonyms Lagenipora 
Waticks, 1899-1913 ; Siniopelta Levinsen, 1909. 
“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; l’apertura zoeciale subtrigona con labbro 
calloso; grandi aviculari scafoidi sono sparsi fra i zoeci.” (Neviani.) 14 tentacles. 
Genotype. — Costazzia (Cellepora) costazzii Savigny-Audouin, 1826. 
Range - -Vicksburgian — Recent. 
Historical. — Waters, under the name of Lagenipora , and Levinsen, under the 
name of Siniopelta , designated an assemblage of identical forms appearing to con- 
Fig. ISO. — Genus Costazzia Neviani, 1895. 
A-C- Costazzia costazzii Audouin, 1826. A, B. Ordinary zooecia and ovicells, X 30. (After 
Hincks, 1880.) C. Operculum and avicularian mandible. (After Busk, 1884.) 
D-G. Opercula and avicularian mandibles. D. Costazzia tubulosa Hincks, 1880. (After 
Busk, 1SS4.) E. C. ignota Norman, 1909. (After Norman, 1909.) F. C. costata MacGillivray, 
1868. (After MacGillivray, 1S6S, and Waters, 1SS5.) G. C. lucida Hincks, 1884. (After Waters, 
1899.) 
stitute a rather natural genus. However, the type itself of Lagenipora socialis 
Hincks, 1880, is not comprised in the list given by Levinsen, and he himself classed 
it in Schismopora. Considering that the zooecia of Lagenipora socialis are oriented 
and by no means cumulate, we have maintained the genus of Hincks with its primi- 
tive definition in the family of Phylactelliclae. 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. 
