138 
BULLETIN 125, UNITED STATES NATIONAL MUSEUM. 
It is therefore probable that after the passage of the eggs the polypide disappears 
by histolysis. The zooecia with calcified orifice are not rare. Sometimes a small 
gibbosity occurs on the frontal. 
Occurrence. —Miocene (Duplin marl): Wilmington, 8 miles east of Snow Hill, 
10 miles south of Greenville, and Natural Well, 2 miles southwest of Magnolia, 
Duplin County, North Carolina (common). Miocene (Yorktown formation): 
Suffolk, 3 miles southwest of Petersburg, and other localities in Virginia (common). 
Miocene (Bowden marl): Bowden, Jamaica (rare). Pliocene (Waccamaw marl): 
Waccamaw River, Horry County, South Carolina (common). 
Cotypes. —Cat. Nos. 68620-68625, U.S.N.M. 
Genus CYCLICOPOBA Hincks, 1884. 
(For description, see Bulletin 106, U. S. National Museum, p. 424.) 
CYCUCOPORA MULTILAMELLOSA, new species. 
Plate 46, figs. 3-6. 
Description. —The zoarium is free, irregularly orbicular, striated concentrically 
on the inferior face and formed of many superposed lamellae. The zooecia are 
heaped upon each other, little raised, nonoriented, distinct, elongated, hexagonal 
or rectangular; the frontal is little convex, tuberous, and formed of a tremocyst 
with scattered pores, resting on an olocyst. The apertura is elliptical, transverse, 
with a concave proximal border; it is placed at one of the zooecial angles. In 
the immediate vicinity of the apertura there is a small orbicular avicularium 
sometimes transformed into a long transverse avicularium. The ovicell is globular, 
salient, very large, partially embedded in the distal zooecium and always closed 
by the operculum; it is covered by the tremocyst. 
Measurements. —Apertura 
ha = 0.15 mm. 
la =0.20 mm. 
Zooecia 1 
(L 2 = 0.80 mm. 
[ Zz = 0.60-0.80 mm. 
Variations. —The zooecial dimensions are quite variable; the zooecia are 
elongated or transverse. The characteristic of this species is the excentric position 
of the apertura; this and the avicularium occupy the distal portion of the zooecium. 
In the interior the aperture occupies its usual median position; it is therefore 
the irregularities of calcification which causes its exterior aspect. 
Occurrence. —Pleistocene: Mount Hope, Panama Canal Zone (rare). 
Cotypes.— Cat. No. 68626, U.S.N.M. 
CYCLICOPORA? MANSFIELDI. new species. 
Plate 19, fig. 11. 
Description. —The zoarium incrusts Cellepore bryozoa. The zooecia are 
distinct, separated by a furrow of little depth, elongated, elliptical; the frontal is 
little convex and covered with large, widely spaced tremopores. The apertura 
is suborbicular, the proximal border being simply concave; neither cardelles nor 
peristome are present. 
Measurements. —Apertura 
7wt = 0.12 mm. 
la =0.12 mm. 
Zooecial 
[Lz = 0.35 mm. 
lz =0.25-0.30 mm. 
