NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
247 
14, 20), and finally the normal zooecia are developed (figs. 7, 9, 10, 12). The zone 
of small zooecia does not always develop (fig. 11), but, fragments containing the 
two sorts of zooecia are very common. 
The endozooecial ovicell is clearly apparent on the splendidly preserved speci- 
men shown in figure 9. Generally it has the more voluminous aspect shown in 
figures 7 and 10. 
In the interior the fragile partitions limit the radial rows of zooecia (fig. 15), 
and the opesium and the cryptocyst have the same form. The zooecia have 
no basal wall (fig. 16) ; the very oblique and much-developed distal wall has an 
ovicell ( ov ., fig. 16). Certainly chitinous walls must have taken the place of 
the usual calcareous walls here absent in order to limit the general cavity which 
contains leucocytes, ovula, spermatozoa, and the polypide, and separates it from 
the large partitioned zoarial cavity which can onty contain sea water. 
The vibracula are as large as the zooecia ; they are present in all the interzooecial 
angles, whereas in Lunularia Vicksburg ensis and in L. contigua there is in one row 
only one vibraculum to two zooecia. 
The same large, partitioned zooecial cavity exists also in Lunularia contigua; 
but the latter species has smaller zooecia and is provided with a complete basal 
wall. 
Occurrence. — Middle Jacksonian: Wilmington, North Carolina (common), 
Lonsdale’s type locality; near Lenuds Ferry, South Carolina (common) ; Eutaw 
Springs, South Carolina (common) ; 18 miles west of Wrightsville, Georgia (com- 
mon) ; 34 miles north of Grovania, Georgia (rare). 
Upper Jacksonian (Ocala limestone) : West bank of the Sepulga Eiver, Es- 
cambia County, Alabama (rare). 
Jacksonian (Zeuglodon zone) : Bluff south side of Suck Creek, Clarke County, 
Mississippi (rare) ; Cocoa post office, Choctaw County, Alabama (rare). 
Vicksburgian (Marianna limestone) : One mile north of Monroeville, Alabama 
(rare) ; west bank of Conecuh River, Escambia County, Alabama (rare). 
Plesiotypes . — Cat. Nos. 63997, 63998, U.S.N.M. 
LUNULARIA CONTIGUA Lonsdale, 1845. 
Plate 39, figs. 1-5. 
1845. Lunulites contigua Lonsdale, Account of twenty-six species of Polyparia obtained 
from the Eocene Tertiary formations of North America, Quarterly Journal Geo- 
logical Society of London, vol. 1, p. 533, fig. (not Emmons 1858= L. distans Lons- 
dale, 1845). 
D escnption .- — The zoarium is a large conical Lunulites in which the zooecia 
and avicularia are disposed in distinct rows. The small zooecia are ogival, little 
distinct, transverse. The cryptocyst is of little depth and is as long as the opesium ; 
the opesium is semilunar with a nearly straight proximal border. The large 
zooecia have no cryptocyst. Each zooecium has the form of an isolated, closed 
sac, situated in a large, partitioned zoarial cavity. The vibracula are long and 
narrow, with two lateral, improminent condyles, disposed in special rows, but with 
