NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
279 
Occurrence. — Middle Jacksonian (Castle Hayne limestone) : Wilmington, 
North Carolina (common) ; Eutaw Springs, South Carolina (common) ; near 
Lenucls Ferry, South Carolina (common). 
Cotypes. — Cat. No. 64015, U.S.N.M. 
Genus QUADRICELLARIA D’Orbigny, 1850. 
1850. Quadricellaria D’Okbigny, Paleontologie frangaise, Terrain cretac<§, Bryozoaires, p. 32. 
Zoarium articulated; segments quadrangular; two opposite faces with large 
zooecia and the other two with small zooecia. 
Genotype. — Quadricellaria elegans D’Orbigny. 
Range. — Turonian-Senonian. 
D’Orbigny’s genus is rather well delimited, but it has been extended to include 
all forms with rectangular zoaria. Moreover, it is more of a zoarial form than a 
thoroughly established genus. 
The two species which we doubtfully classify in Quadricellaria have in effect 
quadrangular segments, but their affinities are with Macropora. The specimens are 
not ovicelled and can not be positively classified generically at the present time. 
QUADRICELLARIA (?) LACINIOSA, new species. 
Plate 40, figs. 18-20. 
Description. — The zoarium is articulated, with segments quadrangular; each 
face bears on each zooecium a large slit in the form of a crescent. The zooecia 
are quite elongate, distinct, formed of two parts. A shallow, very finely punctate 
cryptocyst and an inferior triangular gvmnocyst. The aperture is semilunar and 
surrounded by a prominent peristome; the proximal border is straight with two 
small lateral slits. The ovicell is endotoichal. 
Measurements. — Aperture 
|ffa=0.08 mm. 
U«=0.06 mm. 
„ . fZs=0.50mm. 
Zooecia 7 
[fo=0.22 mm. 
Affinities. — The zooecia are joined back to back and arranged in alternating 
pairs at right angles, as in Dimetopia. 
This species is not a Quadricellaria and certainly belongs to a new genus, 
although different from the genus represented in Quadricellaria Imrnsi. To create 
this genus one should know the ovicell and possess many specimens. We have only 
collected three segments. 
O ccurrence. — Middle Jacksonian (Castle Hayne limestone) : Wilmington. North 
Carolina (very rare). 
Cotypes. — Cat. No. 64013, U.S.N.M. 
QUADRICELLARIA (?) BURNSI, new species. 
Plate 40, fig. 21. 
Description. — The zoarium is articulated and radicellated ; it contains a row 
of zooecia on each of the four faces. The zooecia are quite elongate, distinct, bor- 
dered by a very slightly elevated mural rim ; the cryptocyst is smooth and shallow. 
