274 
EADIOPORID^. 
at the upper end of the stem 
and thus belongs to Tholopora. 
but the zoarium is still clavate, 
LIST OF SPECIMENS. 
D. 3656. Three zoaria (in tube). 
in diameter, and has an annulated stem ; the zoarium is only suh- 
clavate, as it expands rather gradually upward. There are eight 
apertures in each vertical series. The second zoarium is clavate, 
and is 10 mm. high and 3 to 4|mm. in diameter. The third 
zoarium is a sub -cylindrical annulated stem, only slightly expanded 
at the upper end. Hauterivian. Cressier, near Neuchatel. 
Bruckmann Coll. 
D. 3659. A clavate zoarium, 13mm. high, 7x4 mm. in diameter; the top is 
bilobed. Hauterivian. Cressier, near Neuchatel. Bruckmann Coll. 
D. 3658. A zoarium with two thin slides cut from it. Hauterivian. Cressier, 
near Neuchatel. Bruckmann Coll. 
D. 3657, A small specimen mounted on slide. Hauterivian. Cressier. 
Bruckmann Coll. 
3. Tholopora colligata^ (Gregory), 1909. 
Synonymy. 
Bomopora colligata, Gregory, 1909. New Cret. Bry. : Geol. Mag. dec. v. 
vol. vi. p. 65. 
Diagnosis. 
Zoarium large and irregular ; from the upper side it appears 
tubercular and massive. On a side view it is seen to be 
composed of numerous columns which are often attached, 
giving the zoarium a massive aspect like a Radiopora. The 
sub-colonies are distinct and thick. 
Apertures irregular in the centres of the sub-colonies, but 
become radial and vertical on the 
sides. In the lower 
sub-colonies the regular arrangement of the apertures is 
obscure, as most of the apeikures in 
the vertical series are 
covered by the overgrowth of the upper sub-colony. 
Dimensions. 
mm. 
Height of zoarium ... 
20 
Diameter of zoarium 
32 
Thickness of sub-colonies 
2-1 
Diameter of sub-colonies ... 
3-4 
Diameter of apertures 
... about "2 
Diameter of mesopores 
about -09 
^ From colligare, ‘ to bind together 
constituent columns of the zoarium. 
from the close attachment of the 
