NOTES AND QUERIES. 
517 
NOTES AND QUERIES. 
Flint Implements at Aylesford, Kent. — Sir, — A few weeks since, a 
friend of mine picked out of some river drift which had been dredged from 
the Medway near to Aylesford, a most highly-finished flint hatchet. I am 
sorry to say I fear we shall lose it for our museum, as the finder is going to 
take it to Oxford. I have not had the luck to get a specimen, but hope to do 
so, as that elevated bed of ancient river-drift at the back of Aylesford church 
ought to yield some. — Yours, &c., W. H. Bensted, Maidstone. 
EuoMPHALUs carinatus. — Dear Sir, — Last month the Liverpool Geolo- 
fical Society made an excursion to the Silurian district of Coalbrookdale, 
uring which many interesting fossils were obtained. From a quarry of Wen- 
lock limestone on BenthaU Edge, I obtained a finely-preserved specimen of 
Enomphalus carinatm, retaining a considerable portion of the shell. My reason 
for calling attention to this fact is that I cannot ascertain that this shell has 
been discovered in the Wenlock series before. Both in " Siluria" and Pro- 
fessor Morris's " Catalogue of British Fossils," it is mentioned as occurring 
in the Aymestry Limestone. Perhaps, if you consider these remarks worthy 
of insertion in the " Notes and Queries," some one of your numerous readers 
will inform me whether this shell has hitherto been met with in the Wenlock 
Limestone. — Yours, &c., W. S. Horton, Liverpool. 
Native Coke in Moravia. — Native cokes have been found at Mahrisch- 
Ostraw (Moravia), at a depth of about two hundred and eighty feet, along the 
line where one of the coal-beds worked there is in contact with eruptive rocks. 
The metamorphic action has penetrated into the coal to a depth of three or 
four inches. A similar occurrence was observed in 1856 in the coal-beds of 
Witkowitz, partially altered into cokes by the contact of greenstone. 
REVIEWS. 
" Proceedings of the Geologists* Association^* No. 7. 
The seventh number of these Proceedings has reached us, and it is with 
pleasure we remark, not only an improvement in the diction and printing, which 
would indicate that the matter has received some editorial care, and has been 
passed under some competent eye, but there is an improvement also in the 
quality of the papers themselves. In the first paper our old friend Mr. 
Wetherell, who for so many years has done so much good work in looking over 
little things, treats " On the Opercula of Ammonites in Flint Pebbles from 
the Gravel of Whetstone." In all strata containing ammonites the trigoneUites 
should naturally be expected to be met with — as indeed they are — for to suppose 
them rare is a mistake, as any one may prove by cracking off sideways pieces 
from the mouth-edges of common grey-chalk ammonites, such as Am. variansy 
Am. Mantellii, and Am. navicularis. What is most wanted to be done is some 
one to spend his time in breaking up different species of ammonites and 
figuring the kind of trigoneUites which belong to each. Another of Mr. 
Wetherell's papers printed is. " On Oviform Bodies from the Londou Cky> 
