DISCOFASCIGERi.. 
35 
LIST OF SPECIMEXS. 
D. 1874. Three zoaria on a slide. This is the type -specimen figured by Vine 
in 1884, Cambridge Greensand. Cambridge, Jesson Coll. 
D. 1857. A zoarium recorded by Vine as Lichenopora sp. Cambridge 
Greensand. Cambridge. Jesson Coll. Figd. Yol. II. PI. IV. 
Figs. 5<7, b. 
D. 1864. A zoarium identified by Vine as L. radiata (Aud.). Cambridge 
Greensand. Cambridge. Jesson Coll. Figd. PL VII. Figs. 3a, 
D. 1865. A zoarium identified by Vine as L. radiata (And,). Cambridge 
Greensand. Cambridge. Jesson Coll. 
3. Discofascigera ligeriensis, d’Orbigny, 1853. 
Stnonymy. 
Biscofascigera ligerieusis, d’Orbigny, 18o3. Bry, Cret. p. 675, pi. 743, figs. 4-7. 
,, ,, Pergens, 1890. Rev. p. 378. 
Diagnosis. 
Zoarium with the disc subcircular or irregularly elliptical in 
shape, and the upper surface tumid. The apertures are 
an-anged irregularly. The lower surface is covered by a dense 
epizoarial layer, which may be marked by horizontal annular 
lines. 
Dimensions. 
Height of zoarium 
Diameter of zoarium 
Diameter of apertures 
D’Orbigny’s type. 
1*5 mm.* 
2-3 „ 
•13 „ * 
B.M. D. 3278. 
1*7 mm. 
2-4 ,, 
• 1--12 ,, 
Destribution. 
British : 
Upper Chalk : between Black Head and Gobbin, Magee Island ; Ballytoben 
and Whitewell, Xorth-East Ireland. 
F OREIGN : 
Senonian — Coniacian ; Varennes and Vendome, Loir-et-Cher. 
Figures. 
PI. IV. Fig. 4. A zoarium from the side; X 10 dia. Dpper 
Chalk : Magee Island, Ireland. Presented by J. Wright, Esq., 
F.G.S. D. 3278. 
Affinities. 
The Irish specimens have a smooth and the French a horizontally 
wrinkled epizoarial layer over the lower surface. 
* Estimated from d’Orbigny’s figures. 
