MADREPORARIA OF THE BOULONNAIS. TS 
Genus ANABACIA. 
ANABACIA comPpLANATA, Defrance, sp. 
Fungia complanata, Defr. Dict. Sc. Nat. t. xvii. p. 217 (1820). 
Anabacia orbulites, Milne-Edwards and Haime, Brit. Foss. Cor. 
p. 121. 
Anabacia conplanata, Milne-Edwards and Haime, Hist. Nat. Corall. 
Pet, ps OL. 
Specimens of this abundant and widespread species have been 
forwarded by M. Rigaux from wine Great Oolite of Marquise and 
Hydrequent. 
Anasacta Bovcnarpi, Milne-Edwards and Haime, Polyp. Foss. 
des Terr. Paléoz p. 122 (1851). 
I fail to satisfy myself that this species is really distinct from the 
last. It is characterized by the greater number and the extreme 
delicacy of the septa; but in both these respects it is approached so 
nearly by some examples of A. complanata that it is very difficult 
to determine where one species ends and the other begins. 
As it was from specimens from Boulogne that MM. Muilne- 
Edwards and Haime first described this species, the specimens from 
M. Rigaux possess especial interest and value for comparison. Spe- 
cimens have been received from Le Wast. 
Genus GunapactA, Milne-Edwards and Haime. 
GENABACIA STELLIFERA, d’Archiac, sp. 
Fungia stellifera, dArchiac, Mém. de la Soc. Géol. de France, 
2me série, t. v. p. 369, pl. 25. fig. 2 (1843). 
Genabacia stellifera, Milne-Edwards and Haime, Ann. des Sc. Nat. 
dme série, t. xv. p. 92 (1851). 
Specimens of this well-marked species from the Cornbrash of 
Marquise, one of the localities quoted by the original describers of 
the genus Genabacia, resemble in all respects examples received 
from M. de Fromentel, which he obtained from the ‘ Bathonien ” 
formation of Montarlot. I have long expected to meet with the 
genus Genabacia in our English Oolites, but have not as yet been 
successful in my search for it. 
Genus MicrosoLEna. 
Microsonena excetsa, M.-Edw. and Haime, Brit. Foss. Cor. p. 124, 
ploexxy. fe. on (liso) 
A single example unquestionably referable to this species has 
been sent by M. Rigaux. It agrees in all respects with English 
specimens. From the Great Oolite of Hydrequent. 
