792 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
Occurrence. — Middle Jacksonian (Castle Hayne limestone) : Wilmington, 
North Carolina, (rare). 
Cotypes. — Cat. No. 65366, U.S.N.M. 
TERVIA PYRIFERA, new species. 
Plate 146, figs. 9-12. 
Description. — The zoarimn is free and formed of bifurcated branches with 
elliptical transverse section; the dorsal is round and smooth. The fascicles are 
very salient and border the zoarial margins; they always contain about five tubes. 
The tubes are little convex, flat, distinct, separated by a slight furrow. The ovieell 
is large, globular, elongated, pyriform , placed at the bifurcation of the branches; 
the oeciostome is salient, elliptical, transverse. 
-Distance between the fascicles 0.50 mm. 
Width of the fascicles 0.12 mm. 
Measurements. — Average diameter of the tubes 0.08 mm. 
Diameter of the zoarium 0.75 mm. 
Number of tubes to the fascicle 5. 
Affinities. — Like Tervia tumida Smitt, this species belongs to the second group 
of Tervia , whose aspect is absolutely identical with that of typical Idmonea. It 
differs from it in its larger ovieell placed at the bifurcation of the branches and 
in a lesser interfascicular distance (less than 0.52 nun.). 
This species differs from Tervia globulifera in its pyriform ovieell, its greater 
interfascicular distance, and in its fascicles bordering the zoarial margins. 
Occurrence. — Middle Jacksonian (Castle Hayne limestone) : Wilmington, 
North Carolina (rare). 
Holotype. — Cat. No. 65367, U.S.N.M. 
LAGONOECIA, new genus. 
Greek : lagon , flank, referring to the position of the ovieell. 
The ovieell is symmetrical, globular, suspended on one of the sides of the 
zoarium ; the oeciostome is transverse, terminal. 
Genotype. — Lagonoecia lamellifera , new species. Lower Jacksonian. 
LAGONOECIA LAMELLIFERA, new species. 
Plate 112, figs. 1— S. 
Description. — The zoarium is an Idmonea with claviform, triangular, and 
often reticulate branches. The fascicles are formed of five to six tubes; they are 
arranged transversally and alternately on each side of the median axis; they are 
very salient and form like very oblique lamellae , imbricated one above another. The 
tubes are distinct, flat, bordered by a salient thread ; the peristome is thin and 
quadrangular. The zone of growth is large, salient, and triangular. The posterior 
face (dorsal) is very finely striated longitudinally. The ovieell is large, very con- 
