CLYPEIN-A. 
279 
2. variolaria (Leymerie), 1851. 
Syn. Fustulopora variolaria, Leymerie, 1851. Nouv. type Pyren. : Mem. Soc. 
geoL France, ser. 2, vol. iv. p. 192, pi. ix. 
fig. 7. 
Char. — Zoarium with irregular series of tubercles in the middle area. Apertures 
in lateral pinnate series of from four to five. 
Distrib. — Senonian — Maastrichtian : Bois de la Barade, near Gensac, Haute- 
Garonne. 
CLYPEINA, Michelin, 1844. 
[Icon. Zooph. p. 177.] 
Diagnosis. 
Zoarium infundibuliform, fixed by a discoid base. Stem long 
and gradually expanding, marked by longitudinal depressions 
along the sutures. Upper surface a conical depression. 
Apertures along the upper margin ; uniserial or biserial, small. 
Type Species. 
Clypeina marginiporella, Michelin, 1844. Icon. Zooph. p. 177, 
pi. xlvi. fig. 27. Eocene : Morigny, near Etampes, Seine-et-Oise. 
Eemaeks. 
This genus, by its cupuliform zoarium, resembles Discosparsa in 
the Diastoporidan series, but it differs from that genus by having 
the apertures limited to a single or double series round the rim. 
The upper surface (Fig. 28^) is bare of apertures. The genus 
has resemblance to the Theonoidae, but that appears, however, 
superficial. Its real affinities appear to be with the Entalophoridae. 
It may be regarded as a small ally of Entalopliora cmomalissima, 
with which it agrees in having a solid stem and distal cupuliform 
expansion; in E. anomalissima the apertures are very irregularly 
distributed on the stem, and in the disc tend to crowd round 
the margin. Clypeina may have developed by continued variation 
in these directions. The genus is rare, so that the Museum has 
insufficient material for any to be spared for microscopic sections. 
And it is quite possible that this genus, Corymlopora, and JJmlrellina 
may be only the larval stages of other Bryozoa. 
