6 GEOLOGICAL MEMOIES. 



Specimens of Haplopliragmium c/rande, d'Orb., Ataccophragmmm 

 ohesum, Eeiiss, and Cristellaria rotulata, have been found, besides 

 other undetermined Foraminifera which are usually obtained from 

 the upper and white chalk of the province. Numerous fragments of 

 a shell have also been discovered, which appear to belong to an 

 Inoceramus (CatiUus Cuvieri, d'Orb.), which ranges from the upper 

 grey chalk of the Nervien to the Maestriclitien system. With these 

 Cretaceous species others are found, identical ^\ith those from the 

 Goffint well ; but the authors are of opinion that these belong to a 

 superior formation, having accidentally been brought up by the bor- 

 ing-apparatus. Below this a soft white chalk of subgranular tex- 

 ture was met with, containing flint identical with that from the 

 yellow limestone, and with the same abundance of Foraminifera and 

 CatiUus. The yellow limestone, with flints of the Lebreton (Toil- 

 liez) sinking, cannot be correlated with any heel of the province, 

 although in some places a zone of very hard compact white chalk 

 exists immediately below the Maestrichtien system ; and the authors 

 are of opinion that this yellow limestone corresponds to a part of 

 the upper white chalk of Spiennes, and that its yellow tint and 

 hardness are due to some mineralogical peculiarity. The "■ calcaire 

 grossier" of this section thus rests upon the white chalk without 

 the intervening Maestrichtien system. 



The authors then describe other sections to the south-west of 

 Mons, in all of which the " calcaire grossier" was found, noticing 

 especially the section presented by an artesian well sunk at Marais, 

 in the commune of Cuesmes. Here, after passing through 88 feet 

 of glauconitic sand, a yellow limestone (calcaire grossier) was reached, 

 containing the new TrocliocyatJms so abundant in the Goffint well. 

 This limestone overlies the Upper Chalk of Ciply, from which Bry- 

 ozoa, Fissurirostra Palissi, Woodward, and Thecklea pa]oillata, 

 Bronn, have been collected. 



A very important section in regard to the extension of this " cal- 

 caire grossier" is then described by the authors. It is exposed in a 

 railway-cutting to the west of Boussu, on the road to Hainin. Be- 

 low some sands, with limonite, a friable yellowish limestone is 

 exposed, from which Corh's, Lucina, Area, Trocliocyatlms, n. sp., 

 and another coral, besides many of the jForaminifera and Entomo- 

 straca characteristic of the Goffint well were obtained. With these 

 species, which belong to the " calcaire grossier de Mons," the 

 authors discovered a Cklaris, and another undetermined Echino- 

 derm, the cardinal region of Terehratula carnea, Sow., and a The- 

 ciclea 'painllata, Bronn. The admixture of the last two species, 

 which are Cretaceous, with the rest, is suggested to be due to the de- 

 nudation of the anterior beds by the waters of the sea in which the 

 " calcaire grossier" was cleposited. In the jDresent state of our 

 knowledge of the valley of the Haine, the authors hesitate to say 

 whether the mass of " calcaire grossier" of Mons has any relation 

 to that of Hainin, although the results furnished by the different 

 sinkings executed to the north and south of the canal incline them 

 to think that the connexion does not exist. The conclusion which 



