214 
ZONATULID^. 
Fig. 55, p. 213. Part of a Tertical section near the edge of 
a zoarium of var. irregularis, showing zooecia cut longitudinally 
and transversely, and the moniliform distal walls of the outer 
zooecia; X 18 dia. Maastrichter Kalk : Maastricht. Van Breda 
Coll. D. 3468. 
Fig. 56, p. 213. Part of the vertical section of a long branch, 
5mm. in diameter, of var. irregularis', X 18 dia. Maastrichter 
Kalk : Maastricht. Van Breda Coll. D. 3469. 
DlSTBIBIJTIOIf. 
Senonian — Maastrichtian : Maastricht and Vetschau. 
Affinities. 
This species is the type of the genus. The form is variable, 
hut it always has a branched zoarium usually with thick branches. 
LIST OF SPECIMENS. 
A. Typical variety, with spiral band of mesopores. 
Two stems, of which one is 31 mm. long x 5 mm. diameter. Maas- 
trichter Kalk. Maastricht. Van Breda Coll. 
Two stems with the torsion of the stem faintly indicated. The 
surface agrees exactly with von Ilagenow’s figure (Xo. 9<^). The 
branches are laterally compressed. The label of the Van Breda 
Collection identifies the species as Millepor a madreporacea, Goldf.” 
Maastrichter Kalk. Maastricht. Van Breda CoU. 
Two thin branches, 3-4 mm. in diameter; one is 24mm. long, and 
shows a very faint torsion. Maastrichter Kalk. Maastricht. 
Van Breda Coll. 
B. Var. annulata. 
A thick zoarium with anastomosing branches and two fragments. 
Maastrichter Kalk. Maastricht. Yan Breda Coll. Figd. PI. YII. 
Figs. 5a, b. 
Ten stems (in tube). Maastrichter Kalk. Maastricht. Van Breda 
Coll. 
A specimen with thick branches and annular grooving. Three slides 
cut from the same zoarium. Section figd. PI. YII. Fig. 4i. 
Maastrichter Kalk. Maastricht. Yan Breda Coll. 
A stem with annular groo\dng ; it is 12 mm. broad at the base ; the 
stem is 65 mm. in diameter and 18 mm. long. Maastrichter Kalk. 
Maastricht. Yan Breda Coll. 
C. Var. irregularis. Irregular variety resembling Ceriopora, but 
with irregular laminae. 
D. 3468. A zoarium and thin section. Maastrichter Kalk. Maastricht. 
Yan Breda Coll. Fig. 55, p. 213. 
D. 3363. 
60,167. 
D. 3411. 
60,164. 
D. 3414. 
D. 3366. 
L. 3364. 
