6 
THEONOID^. 
1. Actinopora brongniarti (Milne-Edwards), 1837. 
Synonymy. 
Tubulipora brotigniarti, Milne-Edwards, 1837. Mem. Tubul. : Ann. Sci. nat., 
Zool., ser. 2, vol. viii. p. 334, pi. xiv. fig. 1. 
,, ,, Michelin, 1843. Icon. Zooph. p. 122, pi. xxxi. fig. 4. 
non ,, ,, Manzoni, 1877. Brioz. Mioc. Austr. TJngh. : Denk. Akad. 
Wiss. 'Wien, vol. xxxviii. pt. ii. p. 20, pi. xviii. fig. 73. 
Defrancia ,, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 266. 
Actinopora d’Orbigny, 1853. Bry. Cret. p. 762. 
,, cretacea, d’Orbigny, 1851. Ibid. pi. 643, figs. 5-8. 
,, ,, d’Orbigny, 1853. Ibid. pi. 763. 
,, diademoides, d’Orbigny, 1851. Ibid. pi. 643, figs. 9-11, 
^ ,, d’Orbigny, 1853. Ibid. p. 764. 
,, ,, Gamble, 1896. Cat. Bry. Cbatbam, p. 5. 
Defrancia ,, Bucaille, 1890. Bix'. Cret. Seine -Inf. : Bull. Soc. Sci. nat. 
Rouen, vol. xxv. p. 510. 
■ Apsendesia ,, "Sine, 1893. Compl. Rep. ; Rep. Brit. Assoc. 1892, p. 333. 
Diagnosis. 
Zoariiim circular, well raised. There is a well-developed central 
depression and a rather broad peripheral selvage. 
Radii short, triangular, flahellate, and highly raised (less promi- 
nent in the typical form, var. hrongniarti). The rays begin 
uniserially and rapidly widen until they are multiserial. 
Dimensions. 
Diameter of zoarium 
Thickness of zoarium 
Number of rays 
Diameter of apertures 
A typical 
brongniarti (M.-Edw.). 
D. 3098. 
PI. I. Fig. 1. 
3 mm. 
•5 mm. 
14 
*06-'08mm. 
Yar. cretacea. 
B.M., D. 4477. 
PL I. Fig. 2. 
3-3 X 3*1 ram. 
•6 mm. 
17 
•06 mm. 
Disteibution. 
English : 
L”pper Chalk — Zone of Micraster corangninum ; Dover ; Gravesend. 
Foreign : 
Senouian — Maastrichtian : Maastricht ; Ste. Colombe, Manche. 
Campanian : Meudon ; Seine-Inferieure. 
Eiguees. 
PI. I. Fig. 1. A zoarium of the typical Meudon form, attached 
to a fragment of Jfchinocorys scutatus^ Leske ; X 10 dia. Dpper 
Chalk : Dover. J. S. Gardner Coll. D. 3098. 
