DISCOCAVEA. 
237 
D. 4584. A small zoarium ou fragment of (on slide). U 2 )per Chalk. 
England. Loc, ? Morris Coll. 
D. 7278. Two zoaria attached to fragments of Echinocorys scutatiis, Leske. 
Upper Chalk. South of England. Purchased of F. H. Butler. 
Foueigx. 
D. 3430. One zoarium. Maastrichter Kalk. Maastricht. Van Breda Coll. 
2. Discocavea reussi, Gregory, 1909. 
Synonymy. 
Heteroporella collis [non d’Orb.), von Reuss, 1872. Bry. unt. Quad. : Palaeontogr. 
vol. XX. pt. i. p. 133, pi. xxxiii. hg. 6. 
Eucocavea reussi, Gregory, 1909. Xew Cret. Bry. : Geol. Mag. dec. v. vol. vi. 
p. 64. 
Diagnosis. 
Zoarium small, circular, convex, witli a small central depression, 
on the floor of which are about fifteen apertures. Eadial 
series of apertures numerous and crowded, separated by only 
very narrow interradial furrows. About seven apertures in 
each ray. Apertures large. 
Distkibution. 
Cenomanian — Lower Quader : Gamighiigel, near Dresden ; Kahlehusch, near 
Dohna, Saxony. 
Affinities. 
This species is most nearly allied to Discocavea irregularis^ 
d’Orbigny, from which it differs by the insignificance of the 
interradial furrows. 
D. 4466. Sixteen specimens (in tube). Cenomanian — Lower Quader. Kahle- 
busch, near Dohna, Saxony. Presented by Dr. H. Credner, 1898. 
3. Discocavea longiradiata, Gregory, 1909. 
Synonymy. 
Eiscocavea longiradiata^ Gregory, 1909. New Cret. Bry. : Geol. Mag. dec. v. 
vol. vi. p, 65. 
Diagnosis. 
Zoarium large, thin, circular. Zooecia very numerous ; apertures 
occurring in numerous long radial series, each containing from 
about ten to sixteen apertures. No selvage. Interradii very 
narrow. 
Dimensions. 
Diameter of zoarium 
Number of radii ... 
Number of apertures in each radius 
Diameter of aperture 
6 X 8’5 mm. 
40 
10-16 
•08-‘l mm. 
