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. 



/; ~" B .as 



'H .descostilsii Savl^ny 



Holoporella plgmentarla tfatera' 



FIG. 181. Genus Holoporella Waters, 1009. 



A, B. HoloporeUa decostilsii Savigny-Audonin, 1826. A. Zooecia, X 2.j. B. Operculum and 

 avicularian mandible, X 85. 



C-E. Opercula and mandibles. C. HoloporeUa pcrlnsa Smitt, 1872. D. H. vcrmiformis 

 Waters, 1909. E. H. pigmentaria Waters, 1909. (A-E after Waters, 1909.) 



Occurrence. Vicksburgian (Glendon member of Marianna limestone) : West 

 bank of Conecuh River, Escambia County, Alabama (very rare). 

 Holotype.Cat. No. 64326, U.S.N.M. 



Genus HOLOPORELLA Waters, 1909. 



1909. HoloporeUa WATERS, Reports on the Marine Biology of the Sudanese Red Sea, etc., 

 XII. The 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 



