NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
165 
RAMPHONOTUS BACCATUS, new species. 
Plate 30, fig. 5. 
Description .— The zoarium incrusts shells. The zooecia are small, distinct, 
pyriform with a short gymnocyst ; the mural rim is prominent, flat, oblique, granu- 
lar. The opesium is elongate, oval. The ovicell is hyperstomial, never closed by 
the opercular valve. The small pedicellated avicularium is slightly projecting 
and rounded. 
M easurements . — Opesia 
|At»=0.18 mm. 
|7o=0.10 mm. 
Zooecia 
Zs=0.35 mm. 
72=0.20 mm. 
Affinities . — The figured specimen represents the area about the ancestrula, and 
the marginal zooecia are alone considered as normal. We have observed some 
zooecia with the mural rim double, which in consequence have undergone total 
regeneration. 
This species differs from Ramphonotus levis in its granular mural rim which 
has somewhat the aspect of a collar of pearls. 
Occurrence . — Middle Jacksonian (Castle Hayne limestone) : Wilmington, 
North Carolina (very rare). 
Holotype.- — Cat. No. 63933, U.S.N.M. 
RAMPHONOTUS REGULARIS, new species. 
Plate 30, figs. 6-8. 
The zoarium incrusts shells. The zooecia are distinct, elongated, pyriform; 
the mural rim is thin, salient, regular. The opesium in anterior, oval, very finely 
crenulated. The ovicell is hyperstomial, never closed by the opercular valve; 
globose, projecting, with a large frontal callosity, granular. The median avicu- 
larium is very salient, transverse, and its orifice is perpendicular to the zooecial 
plane. The ancestrula is a very small zooecium of the ordinary kind. 
M easurements . — Opesia 
h o=0.28 mm, 
lo= 0.18-0.22 mm. 
Zooecia 
|Z2= 0.40-0.42 
[72=0.30 mm. 
mm. 
V ariations . — The second calcareous layer of the ovicell is very small and forms 
only a thin smooth border around it. Regenerated zooecia appear to be rare. 
Some calcified zooecia perforated with a round pore have been noted. Figure 8 
shows a zooecium with a monstrous avicularium. 
This species differs from both Ramphonotus levis and R. haccatus in its large 
dimensions and in the regularity of its mural rim. 
Occmrence . — Middle Jacksonian (Castle Hayne limestone) : Wilmington, 
North Carolina (common). 
Cotypes. — Cat. No. 63934, U.S.N.M. 
Genus TEGELLA Levinsen, 1909. 
1909. Tegella Levinsen, Morphological and Systematic Studies on the Cheilostomatous 
Bryozoa, p. 152. 
The zooecia, which have spines and a slightly developed cryptocyst, are pro- 
vided with multiporous rosette plates (septulae). Hyperstomial ovicell with an 
