438 M. E. Rigaux — The Brachiopoda of the Boulonnais. 



Strophomena latissima, Bouch. Very common in the sandy band 



over the Ferques limestone. 

 Strojphomena Gosseletii, E. Eather scarce, Beaulieu shales. 

 Leptcena Dutertrii, Murch. Very common in the highest part of the 



Ferques limestone. 

 Leptmia Ferquensis, E. Very common, Beaulieu shales. 

 Leptcena Cedulce, E. Very common, lowest part of the Beaulieu 



shales. 

 Lept^ena Fischeri, Vern. Common, Beaulieu shales. 

 Clionetes armata, Bouch. Very common over the Ferques limestone. 

 Strophalosia productoides. King. Very scarce, Ferques, Beaulieu. 

 Productus subaculeatus, Murch. Common in every bed, Ferques. 



Carboniferous Limestone. 

 Terehratula hastata, Sow. This species is found in great numbers 



in a bed from the highest part of the white limestone, Napoleon 



quarry. 

 Athyris Eoissyi, M'Coy. This species has been found by Mr. 



Dutertre at Hardinghem in the Black quarry, which is now full 



of water. 

 Spirifer laminosus, M'Coy. Occurs sparingly in the white limestone 



at Hydrequent. 

 Spirifer glaber, Mart. Very common in the bed with T. hastata. 

 Productus Cora, D'Orb. This species is found in the lower limestone 



of the La Cote and Malassise quarries ; it is more common in the 



Haut-banc limestone. 

 Productus semireticidatus, Mart. Common in the bed with Tr. 



hastata, was also formerly found in the Black quarry. 

 Productus giganteus. Mart. There occur in a small quarry near 



Ferques, and in another near Hardinghem, crushed specimens of 



a large Productus which Mr. Gosselet refers to this species. 



Bathonian. 

 Terehratula maxillata, Sow. This species occurs sparingly in the 



Great Oolite at Hydrequent and in the Cornbrash, Le Wast. 

 Terehratula submaxillata, Dav. This species is confined within the 



lower beds of the Great Oolite ; Hydrequent. 

 Terehratula glohata, Sow. Very common in the lower part of the 



Great Oolite at Hydrequent, is found also in the Marquise Oolite ; 



the variety Fleischeri, 0pp., occurs unfrequently in the Cornbrash 



at Le Wast. 

 Terehratula intermedia. Sow. Very common in the Cornbrash ; Le 



Wast, Lenlinghem. 

 Terehratida coarctata, Park. Very scarce, Cornbrash, Le Wast. 

 Terehratula hemisphcerica, Sow. I have found a single specimen in 



the Cornbrash ; Le Wast. 

 Waldheimia ohovata, Sow. Very common ; the variety Siddingto- 



nensis in the Great Oolite at Hydrequent; the \BX\ei\es perohovata, 



suhohovata and Stiltonensis in the Cornbrash at Le Wast. 

 Waldheimia lagenalis, Schl. Common in the Cornbrash with the 



variety suhlagenalis. 



