BEEEXICEA. 
Ill 
Disteibetion. 
England : 
Upper Greensand : Cambridge. 
Eed Chalk : Hunstanton. 
Foreign : 
? ? Senonian — Campanian : Eiigen. 
Cenomanian : Gehrden, Hannover ; Schillinge, near Bilin, and 
Kutschlin, Bohemia, in Lower Planer. 
Figebes. 
PI. T. Fig. 4. A young zoarium, X 10 dia. Upper Greensand: 
Cambridge. D. 2981. 
Affenities. 
The position of this species is very unsatisfactory. It was 
founded in 1840 by Homer, but first figured in 1846 by von 
Heuss, who gave figures of two specimens ; neither of them is 
well illustrated, and they may not belong to the same species. 
Later authors have taken the species for the form badly illustrated 
by von Heuss’s fig. 4. The earlier description by Homer does 
not suggest the same species as von Heuss’s Bohemian form ; 
and Homer added to the difficulty of understanding his own 
diagnosis by quoting von Hagenow’s Cellepora flalelliformu as a 
synonym. The original description of that fossil does not agree 
with Homer’s diagnosis, or with von Heuss’s species. ' For, 
according to Homer, his Rosacilla confluens is “ kreisrunde,” 
and consists “ aus mehren Schichten,” whereas von Hagenow 
describes his species as “ \uelgestaltiger,” and consists of a ‘‘zarter 
Uberzug von grosserer oder geringeren Ausdehnung.” 
It therefore seems best to disallow Homer’s species on the 
ground of inconsistent diagnosis. 
The main difficulty in dealing with the B. confluens (Hss.), as 
here accepted, rests in its separation from Berenicea polystoma 
(Horn.). Comparison of PI. Y. Fig. 4 with PI. YI. Fig. 1 shows 
that the specimens here separated between the two species are 
closely allied. In B. polystoma the zooecia are more crowded and 
the peristomes more highly raised. The resemblances between 
the original figures of the two forms given by von Heuss and 
Homer are not so striking ; the two species are linked by the 
resemblance between worn specimens referred to B. poly stoma and 
those of B. confluens. 
