134 
cross the river Windrush by the railway bridge, and a few 
yards more bring us opposite a mill, marked on the Ordnance 
Survey Map, and we next come to a road nearly opposite what 
“is marked as Aston Farm. The section exhibited by this road 
is some irregular rubbly rock, with a fine grained Marly debris 
above, in which I found Terebratula fimbria. Altogether about 
five feet is here exposed. 
The positions on the Ordnance Map are important, because 
this road is marked on the map as G. 4 Sands, and the positicn 
can be easily recognised, because it branches just at this point; 
but instead of being Sands it seems that it is Inferior Oolite, 
with Terebratula fimbria, and the cutting which we have just 
passed through is in reality a tongue of sands extending 
towards the river, but which is not shewn on the map, this 
portion being coloured Upper Lias. It appears to me that 
these beds which belong to the bottom of the Inferior Oolite, 
and these Sands, which I take it, are the equivalent of the 
Cotteswold Sands of other places, can be more or less approxi- 
mately traced and joined on to the second cutting West of 
Bourton (Section II. and IIa.) We do not see the junction 
at any point, but we can easily surmise that the marl with 
Terebratula fimbria underlies at a greater or lesser distance those 
rocks in that section, which by other evidence we know to 
belong to the Upper Freestone Series. The following would 
be somewhat what we should expect to find:— 
Upper Freestone, etc., in Section IIa. ft. 
Mahlon Unseen perhaps about .. nde sie iad 10 
Tisnis Mar! with Tereb. fimbria Lae yy 2. 
Broken Irregular Rock, perhaps te ae 20 
~ Massive Blocks of Limestone aon we 2-5 
Jurense Zone *? —Yellow Micaceous Sands. 
© T have always imagined that the Cotteswold Sands were the zone of 
Am jurensis, but Dr Wright in his section of Frocester Hill, “Lias Am., p. 
138,” places them in the zone of Am. bifrons. It is curious to note in dis- 
cussing these zones, that even this point is doubtful, because I have never 
yet ascertained that Am jurensis occurs in England. Several species have 
been recorded by that name but all incorrectly. The species figured by Dr 
Wright in his Monograph is not Am. jurensis, Zieten, but_a very different shell 
as I was able to convince myself when examining it in the Jermyn Street 
Museum. This species, too, occurs in the zone of Am. opalinus at Haresfield 
and Frocester Hills. 
