352 
IJfVEESAEIA. 
Fig. 43. Sections across the lower part of a branch. Fig. 43<7^ 
a longitudinal section, with three external layers, X 8 dia. 
Fig. 43^, transTerse section, X 9 dia. Maastrichter Kreide : 
Maastricht. Yan Breda Coll. D. 3393. 
Fiff. 43 . — Inversarld tnhipontcca (Goldf.). 
Affinities. 
This species is common in the Maastricht Chalk, but the specimens 
are much rolled, and those showing the external characters are very 
scarce. The shape of the avicularia is unknown. The zooecial 
characters resemble those of Meliceritites distans. I. milleporacea 
is a variety with thinner branches, and slightly more distant 
apertures. 
LIST OF SPECIMEIIS. ' 
D. 7097. A branch and longitudinal section of its end. Maastrichter Kreide. 
Maastricht. Van Breda Coll. Figd. No. 42, p. 351. 
D. 3396. A zoarium with longitudinal and transverse sections. Maastrichter 
Kreide. Maastricht. Van Breda Coll. Figs. 43a, h. 
D. 3395. Nine fragments, some of which include the base. Maastrichter 
Kreide. Maastricht. Van Breda Coll. 
60,154. A series of specimens. Maastrichter Kreide. Maastricht. Van 
Breda Coll. 
D. 3394. Four thick fragments. Maastrichter Kreide. Maastricht. Van 
Breda CoU. 
D. 6336. Eight fragments (on slide). Maastrichter Kreide. St. Pierre, 
Maastricht. Busk CoU. 
