850 STRATIGRAPHICAL GEOLOGY. [Book VI. — 
( 4. Limestone with Cardium obliquum and Cerithiwm 
Upper sub - group Blanvilli. 
with Cardium ob- | 3. Limestone with Cerithium denticulatum and C. 
liquum and Ceri- eristatum. F 
thium denticula- | 2. Siliceous limestone with undetermined forms of 
Potamides. 
1. Coral limestone (Stylocznia). 
4 
3 
tum. 
. Siliceous limestone with parting of laminated 
marl. 
. Limestone in small thin boards with Corbula 


llasses or Upper Calcaire 

. | Middle sub-group 
Ss with Lucina sax- (Rochette). 
R orumand Miliola. + 2. Limestone with Miliola and Lucina saxorum 
aS (Roche). 
<) 1. Siliceous limestone with indeterminate fossils 
( (Banes franes). 
“2 | ft 4. Limestone (dolomitic) with Miliola (Cliquart). 
© | Lower sub-group Green marl ; d ‘ 
with Cerithiwm } 3.{Siliceous limestone in two beds }Blane vert. 
lapidum and Mi- Green marl . _ : : 
liola. 2. Miliola limestone (dolomitic) (Saint Nom). 
1. Siliceous limestone with Potamides. 

“_ 
tula, Cardium aviculare, Miliola, &e. 
. Limestone with Orbitolites, Fusus bulbiformis, 
Volvaria bulloides, Cardium granulosum, Arca 
quadrilatera, several species of large Flustra 
or Membranipora. 
3. Limestone with Fabularia and terrestrial vege- 
tation (Orbitolites complanata, Chama calca- 
rata, Cardita imbricata, &e.). 
2. Mass of Miliola limestone (Turritella imbrica- 
1 
| 
(5. Limestone with Lucina concentrica, Area barba- 
| 
| 4 
4 
taria, Chama calearata, Lucina mutabilis, &e.). 
. Limestone with Miliola and Terebratula (T. bisi- 
nuata). 
Middle Calcaire Grossier, 
(5. Glauconitic calcaire grossier with Cerithium gi- 
| ganteum. 
4. Glauconitic calcareous sand with Lenita patellaris. 
| 3. Sandy glauconitic calcaire grossier with Cardium 
porulosum. 
2. Sandy glauconitic calcaire grossier, with Nwm- 
] mulites levigata, N. scabra, Ostrea multicostata, 
O. flabellula, Ditrupa plana. 
| 1. Glauconitic sand, sometimes calcareous and indu- 
rated, with pebbles of green quartz, sharks’ 
\ teeth, and rolled fragments of coral. 
Lower Calcaire Grossier. 
In Belgium the middle Hocene presents a different aspect from that 
of Paris, approximating rather to the English type. It consists of (1) a 
lower set of sandy beds grouped under the name of “ Bruxellian,” rich in 
fossils, which however are usually badly preserved. Among the forms 
are remains of terrestrial vegetation (Nipadites Burtini), also Paracyathus 
crassus, Maretia grignonensis, Pyripora contesta, Ostrea cymbula, Cardita 
decussata, Chama calcarata, Cardium porulosum, Cerithium unisulcatum, 
Natica labellata, Voluta lineola, Ancillaria buccinoides, Fusus longevus, 
numerous remains of fishes, especially of the genera Myliobates, Otodus, 
Lamna, Galeocerdo, and various reptiles, including species of Trionyx and 
Chelonia with Emys Camperi, Gavialis Dixoni, and Palseophis typheeus ; 
(2) a group of sands and fossiliferous calcareous sandstones (‘“ Lake- 

