BEEEXICEA. 
93 
Yaeietal Chaeactees. 
Zoarium thick and yery irregular in shape ; nsually extensive. 
Surface punctulate, Tvith an irregular selvage bare of 
apertures. 
Zooecia large ; visible only at the distal ends, most of the 
zocecia being immersed in the zoarium. 
Apertures very irregular in arrangement ; large. Peristomes 
Tvell raised. 
B.M., D.3886. 
•2-*4 mm. 
•15--2 ,, 
•06--08 „ 
Disteibtjtton. 
Middle Chalk : Chatham. 
DiMEXsroxs. 
Distance of adjacent apertures 
in same longitudinal series 
Diameter of zooecia 
Diameter of apertures 
Fighees. 
PI. YI. Pig. 7. Part of a zoarium, X 10 dia. Middle Chalk : 
Chatham. Gamble Coll. D. 3886. 
Fig. 4. Part of a zoarium, showing selvage, X 12 dia. 
Fig. 4. — Berenicea regularis (Orb.), var. ambita. The margin of a zoarium, 
X 12 dia. Middle Chalk; Chatham. Gamble Coll. D. 4262. 
Affinities. 
This variety is characterized by its smooth selvage, which is 
free from apertures. The zooecia are larger than in the t 3 rpical 
Turonian form, but smaller than in the var. gamblei. 
