DISCOCYTIS, STEPHAN ODESM A. 
103 
2. irregularis, Marsson, 1887. 
Syn. Discocytis irrf^gularis, Marsson, 1887. Bry. Biig. : Pal. Abh. vol. iv. 
pt. i. p. 42, pi. iv. fig, 1. 
Char. — Zoarium irregular in form ; margin often deeply embayed ; upper surface 
irregularly convex ; underside flat ; radial bundles of few zooecia ; the apertures 
are near the margin and usually open in biserial ridges, Gonoecia on under 
surface smooth, hemispherical. 
Distrib. — Senonian — Campanian : Eiigen. 
Aff. — Marsson says it is allied to D. esseniensis, Simon. 
STEPHANODESMA, Hamm, 1881. 
[Bry. mastr. Ob. -Sen. i., Cycl. p. 34.] 
Diagnosis. 
Osculiporidae (?) with the zooecia grouped in simple or branching 
bundles, which radiate from the base and are arranged to 
form a low, goblet-shaped zoarium. 
The apertures open only on the outer sides of the zooecial bundles. 
Type Species. 
Stephanodesma bifurcation, Hamm. Senonian — Maastrichtian : 
Maastricht. 
Affinities. 
This Bryozoan may be an Osculiporid in which the branches are 
arranged so as to form a goblet-shaped zoarium ; in that case it 
would he a very close ally of Biscocytis, of which the zoarium is 
often funnel-shaped. The genus may, however, be one of the 
Pascigeridae, as the zooecia are said to open on the outer sides of 
the zooecial bundles ; if that statement means that the apertures 
are confined to the bundles, and are merely sub-terminal instead of 
terminal, then the genus would be a close ally of Biscofascigera, 
It appears, however, more probable that the apertures are mainly 
lateral and the affinities with Biscocytis. 
HHHEPRESEOTED SPECIES, 
bifurcatum, Hamm, 1881. 
Syn. Stephanodesma bifurcata, Hamm, 1881. Bry. mastr. Ob. -Sen. i., Cycl. 
p. 34. 
Char, — Zoarium consists of about seven radial, lowly inclined branches, which 
consist of short, thick bundles that subdivide once or twice. Apertures in 
longitudinal rows of about five. Upper surface smooth, though marked with 
fine lines. 
Distrib. — Maastrichtian : Maastricht. (Fairly abundant.) 
