ENTALOPflOKA. 
239 
Distribution. 
Senonian : France and Belgium. 
Dimensions. 
Diameter of branch ... 
Diameter of zocecia 
Diameter of aperture ... 
• 0 - 2*0 mm. 
•20--3 „ 
Var. 2. inconstans, d’Orbigny, 1853. 
Varietal Characters. 
Branches thin, and formed of not very numerous zocecia. 
Apertures rather large, circular, thin-lipped. 
(jonoecium twice or thrice the length of the zocecia; expanded 
at the proximal end. 
Dimensions. 
B.M. 
D. 2285. 
Diameter of branch ... 1*3 mm. 
Diameter of zocecia ... *25--30 ,, 
Diameter of aperture ... -li-'lS ,, 
Distribution. 
England : 
Upper Chalk : Alton Downs, Isle of Wight. 
Middle Chalk : Chatham. 
Foreign : 
Danian : Faxoe. 
Senonian — Coniacian : Les Boches, Loir-et-Cher. 
Turonian : Angouleme ; Villardin, Loir-et-Cher. 
Affinities. 
This variety is very close to the typical Maastrichtian form, in 
which the goncecium is not yet known. The English Chalk form 
is probably a representative of the Maastrichtian and Turonian 
form, but lived in a deeper sea. Eschara ehrenhergi, Hag., is 
probably this variety, but the branches are someAvhat compressed, 
and a zoarial lamina is suggested in the original figure. 
Var. 3. benedeni, von Hagenow, 1851. 
Varietal Characters. 
Apertures flush with the surface of the zoarium; large and 
elliptical. 
Goncecium ? 
B.M. 
D. 4699, 
1 mm. 
•2 „ 
■1 
B.M. 
D. 4700. 
I mm. 
