420 
THE GEOLOGIST, 
Metres. 
8. Eod of Bryozoa 0-20 to 0 80 
9. Hardened rock, eucrustcd by serpulce, bryozoa, and 
oysters ' 0 60 to 070 
10. Craie tuffodu., formerly worked at Bemelcn and Geulhem 
as a building-stone G'OO 
11. Extremely hard and compact rock, containing numerous 
organic remains, amongst which are Belcmnitella niKcro- 
nata, DeutoUuin Mosa, Area, Spoiidi/lus, 8fc. ... 0 30 to 0"40 
12. Second bed of Bryozoa I'OO 
13. Stratum of very hard rock, inclosing a great numljcr of 
lenticular concretions covered with celleporcs, bryozoa, 
and serpulae 0 50 to l^OO 
14. Craie tnffeciK, with fossUs Hemipneustes radiattts, Mesosti/lus 
F(uij(mi, cj-e 12 00 
15. Stratum containing a second bank of oysters, nearly 
entirely composed of Gr/iphrea vesieularis 0'50 
Herr Binkliorst notices as found in this bed teeth and other re- 
mains of MosasuKrus Caniperi, and of species of Cora.r, Olodiis, 
Eiiehodiif!, Lamna, Spluprodus, and Pi/enodus, ■nith portions of the 
carapace of the great marine turtle, Chelone Hoffman iii. 
16. Stratum of hard rock, containing but few fossils 0'30 
17. Craie tuffeau, fossils rare O'O^ 
18. Stratum containing many peculiar Bryozoa and other 
fossils, with reraaiiis of Mosasaiirus and of Chelone Iloff- 
manni 0'22 
19. containing nodules of flint I'OO 
20. Stratum of very hard and compact rock containing nu- 
merous Gasteropods; and often very perfect imprints ; 
casts of a small Turritella (T. soeialis) are extremely 
abundant, with those of Nucula ovaia (NUson) and 
Dentalium sexearinatim 0 30 
Remains of cretaceous plants and trees are also met with in 
this bed. 
21. Craie tuffeau with beds of flint-uodulcs. 
It is not within our present limits to follow Herr Binkhorst minutely through 
the details of the strata of his province, nor to notice those other portions of 
this part of his book which treat of the Coal-measures and Tertiaij deposits 
of his duchy, although these too are liighly interesting, the one having been 
illustrated by the admirable labours of Professor de Koninck, the otlicr by the 
equally valuable productions of M. Nyst and Sir Charles Lyell. With these 
and other topics we may deal when the author presents us with a second 
portion, considering it sufficient at present to draw attention to a work whicli, 
if not so complete as we could wish, nnist stiU prove, tlu-ough the full ac- 
count it furnishes of those singular cretaceous deposits so rich in fossil organic 
remains, of very considerable service to all geologists visiting the interesting 
district of Maestricht. 
