74 
BEBE^ICEA. 
Disteibution. 
England : 
Upper Chalk : Charlton. 
Middle Chalk: Chatham. 
Lower Greensand — Atherfield Clay : Isle of "Wight. 
Fokeign : 
Senonian— Maastrichtian : Meudon. 
Campanian : Riigen. 
Turonian : Nefgraben, near Gosan ; Handorf, Bohemia, in Upper 
Planer (Scaphitenkalk). 
Cenomanian : Schillinge, near Bilin, in Lower Planer. 
Ehodanian : Vassy, Haute-Marne ; Au.xerre, Yonne. 
Neocomian : Saint-Croix, Vand ; ? Schdppenstadt, Hannover, in 
Hilsconglomerat. 
PlGrKES. 
PL Y. Fig. 1. Part of a large zoarium encrusting a stem of 
Choristopetalum impar^ Londs. ; X 8 dia. Lower Greensand : 
Atherfield, Isle of Wight. Morris Coll. 46,802. 
PI. IV. Fig. 5. A zoarium of var. tenuis (Rss.). Middle Chalk : 
Chatham. Fig. ba, the whole zoarium, natural size ; Fig. bh, 
part of the zoarium, X 12 dia. Gamble Coll. D. 382. 
PI. IV. Fig. 6. A zoarium of var. tenuis (Rss.). Upper Chalk : 
Charlton. Fig. 6a, the zoarium, natural size ; Fig. 6^, part of 
the zoarium, X 10 dia. Presented by G. C. Crick, Esq. 
D. 3002. 
Affinities. 
This ‘ species ’ was founded by Milne Edwards on a specimen 
from the Ehodanian of Yassy, in the departement of Haute-Marne. 
In the type the zooecia are well spaced and long ; the apertui'es 
are distant, except at the margin of the zoarium, which is 
flahelliform and irregular. D’Orhigny originally founded two 
species, Diastopora vassiacensis and D. intermedia^ both of which 
he subsequently merged in B. gracilis. A third synonym for 
Lower Cretaceous specimens was made by Eomer, whose Aulopora 
flabelliformis from the German Hilsconglomerat has the elongate 
zooecia of the typical Lower Cretaceous form. Edmer’s figure 
probably exaggerates the elongation; hut if his figure be correct 
his species should perhaps he regarded as identical with 
d’Orhigny’s B. papyracea^ which name it would replace. 
