206 
HETEROPORIDiE. 
but in well-preserved specimens is marked by faint circular 
or subcircular elevations. 
Apertures large, circular, distant. 
Mesopores very numerous ; there are usually two rows between 
neighbouring apertures. 
Dimensions. 7075. 
mm. 
Height of zoarium ... ... ... ... ... 13 
Diameter of zoarium ... ... ... ... 5 
Diameter of zooecia ... ... ... ... -2 
Distance of zooecial centres ... ... ... *4 
Diameter of mesopores ... ... ... ... -1 
Humber of apertures of zooecia per sq. mm. ... 8-10 
Distribution. 
Neocomian — Hilsconglomerat : Schandelahe, Schoppenstedt, Berklingen, 
Kissenbruck, Brunswick ; Goslar, Hannover ; Rauschenberg, Hesse. 
Sainte-Croix [fide Canu) ; Censeau, near Salins, Jura ; lia Varappe, 
Mont Saleve, Switzerland. 
Fig. 52 . — Multierescis tuber osa. Vertical 
section ; x 2|. D. 7075a. 
Fig. 53. — Multierescis tuber osa. Vertical 
section ; x 6f . D. 7075b. 
Figures. 
PI. IX. Fig. 4:a. The side view of a stump-shaped zoarium ; 
X 3 dia. Fig. 4J, the polished reverse side of the same specimen ; 
X 3 dia. Xeocomian : Goslar. Krantz Coll. D. 7075a. 
Fig. 52. Part of a thin vertical section of the same specimen ; 
X 21 dia. D. 7075a. 
