604 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
COSTAZZIA ANTIQUA, new species. 
Plate 100, fig. 22. 
Description . — The only specimen found has been figured ; its state of preserva- 
tion is mediocre and does not permit of a serious study and a complete description. 
The zoarium is hollow and appears to incrust the radicells of an alga. The apertura 
is large and appears to have a large and wide proximal rimule. The ovicell is 
deeply imbedded in the distal zooecia, and probably may be always closed by the 
operculum; its area is large and fragile. There are small interzooecial avicularia 
provided with a pivot and a pointed beak. 
H .descost ilsii Savl^ny 
Fig. 181. — ; Genus Holoporella Waters, 1909. 
A, B. Holoporella decostilsii Savigny-Audouin, 1826. A. Zooecia, X 25. B. Operculum and 
avicularian mandible, X 85. 
C-E. Opercula and mandibles. C. Holoporella pertusa Smitt, 1872. D. H. vermiformis 
Waters, 1909. E. H. pigmentaria Waters, 1909. (A-E after Waters, 1909.) 
Occurrence . — Vicksburgian (Glendon member of Marianna limestone) : West 
bank of Conecuh Kiver, Escambia County, Alabama (very rare). 
Holotype. — Cat. No. 64326, U.S.N.M. 
Genus HOLOPORELLA Waters, 1909. 
1909. Holoporella Waters, Reports on the Marine Biology of the Sudanese Red Sea, etc., 
XII. Tbe Bryozoa, Journal Linnean Society London, vol. 31, p. 159. 
“ The lower lip of the aperture is more or less straight ; the operculum has the 
muscles attached near the border, sometimes with a ridge (for the attachment of 
the tentacular sheath) running inward. The ovicell is a widely open cap. There 
are usually oral and vicarious (interzooecial) avicularia, and the mandible of one 
