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Excerpt from North American Early Tertiary Bryozoa: Plates
Surface of the Eocene form of this species, X 20, and a zooecium more highly magnified. (after Ulrich, Surface of a fragment, X 20. Another fragment, X 20, with vibracular zooecia along the margin. Lowest Eocene (bryozoan bed at base of Aquia formation): Upper Marlboro, Maryland. Cat. No. 63785, Four fragments of the bifoliate zoarium, natural size. One preserves the expanded base. Edge of a zoarium, X 20, exhibiting both vibracular and hydrostatic zooecia. Another specimen, X 20. With vibracular zooecia only. Along the margin. Transverse section. X 20. Tangential thin section of a zooecium, X 100, showing olocystal structure. Tangential thin section of a vibracular zooecium, X 100. View of the interior of the zooecia, X 20, showing one distal and two lateral septulae. Interior of the hydrostatic zooecia, X 20. The aperture is replaced by a small pore. Interior of the ordinary zooecia, X 20. A collar with two small lateral grooves is shown in the aperture. Longitudinal section, X 20, showing the lateral scptulae. Portion of a branch, X 20, in which hydrostatic zooecia occupy the entire breadth. A fragment, X 25, with numerous ovicelled zooecia. Cretaceous (vincentown) Vincentown, New Jersey Cat. No. 63786.
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