154 
CEEIOPOEID^. 
on the upper surface of each segment ; from two to five 
apertures remain exposed in each row. The apertures on the 
outer zone of the upper surface are radial in arrangement 
[fide von Hagenow). 
Dimensions. 
mm. 
Height of zoarium 
4-3 
Diameter of zoarium ... 
3-5 
Diameter of apertures ... 
-06--1 
Disteibution. 
Senonian — Maastrichtian : Maastricht. 
Figtjees. 
PI. YII. Pig. 1. A zoarium from the Maastrichter Kalk^ 
Maastricht. Pig. 1^5, the zoarium from the side; X 6dia. Pig. \h, 
end view; X 10 dia. Gamble Coll. D. 3777. 
Affinities. 
This species is the type of the genus, and is represented by 
a specimen in the Gamble Collection, which had been determined 
by M. Pergens. The first examination of the specimen led me te 
regard it as allied to Reptomulticava, and possibly only a variety 
of the ReptomuUicava common in the Maastricht Chalk ; it differs 
from that Bryozoon, however, in the size of the apertures as 
well as in the structure of the zoarium. 
D. 3777. A zoarium (in tube). Maastrichter Kalk. Maastricht. Identified as 
Befrancia cochloidea by M. Pergens. Gamble Coll. Figd. PI. VII. 
Pig. 1. 
2. Defranciopora libiformis, Gregory, 1909. 
Synonymy. 
Befranciopora libiformis, Gregory, 1909. New Cret. Bry. : Geol. Mag. dec. v. 
vol. vi. p. 63. 
Diagnosis. 
Zoarium of saucer-shaped or cup-shaped sub-colonies, with the 
base of one resting in the cavity of the sub-colony below. 
The rims are well rounded and wide. 
Apertures often in oblique series of three or four in a row, but 
in some parts of the zoarium the arrangement is irregular. 
The sides of the sub-colonies, except on the rim, are smooth and 
imperforate. 
