84 . LOWER OOLITIC ROCKS OF ENGLAND : 
FT. IN, 
Inferior Oolite : f Iron-shot oolitic limestones, very shelly. T 
Lower -s Lima gibbosa, L. pectiniformis, Tri- \ o ^ 
Division ? I chites - - [ 
- ' 'J 
There is no very marked lithological distinction in the beds : 
portions of the lower division of the Inferior Oolite are no doubt 
included, but the mass of the beds with Rhynchonella spinosa 
probably belongs to the zone of A. Parkinsoni: although R. spinosa 
and Galeropygus agaricifornris occur in the zone of A. hum- 
phriesianus. 
Sections at Cattle Hill, and near Shotwell Farm, north-east of 
Yarlington, show beds very similar to those of Woolston. We 
find iron-shot oolite on the top, with Corals; lower down, brown 
shelly oolite with A. Parkinsoni, Lima- pectiniformit, Trigonia^ 
Rhynchonella spinosa, and other Brachiopods, Clypeus, &c. ; and at 
the base of the quarry, other beds of bro\vn jron-shot limestone, 
The shelly beds here belong to the zone.of A. Parkinsoni, and are 
noted as " Trigonia-oviis " by Mr. Hudleston.* 
There are two quarries to the east of Grove, near Castle Gary, 
and these exhibit the same set of beds'. Rhynchonella spinosa 
occurs in shoals in the upper beds, and is also found in the lowest 
bed seen in the Grove quarry, which is opened to a depth of 
18 feet. Other Brachiopods, together with Trigonia, Clypeus, 
and Corals are likewise found. In the adjoining lime-kiln quarry 
we find about 10 feet of oolitic and iron-shot limestones with 
Ammonites Parkinsoni, Clypeus Agassizi, &c., resting on about 
10 feet of limestones with shelly layers, yielding Trigonia; and 
brown sandy and iron-shot limestones. Mr. Hudleston notes that 
Cryptaulax (Cerithium) contorta and Cerithium sub-scalariforme 
are plentiful in beds belonging to the zone of A. Parkinsoni^ 
The lowest beds are probably not far removed from the Midford 
(or Yeovil) Sand, but they do not exhibit themselves in a suffi- 
ciently fossiliferous form to indicate their particular zone. 
The bottom bed noticed by Mr. Hudleston is a calciferols grit 
with *' keeled Ammonites," and above it he records the presence 
of a pale stone with Rhynchonella spinosa and a small Stephano- 
ceras (the sub-genus to which Am. humphriesianus belongs). This 
bed recalls that of Milborne Week (see p. 80). 
In a road-cutting (Pitcomb Road) south of Cole Station, we 
find a section of the Midford (or Yeovil) Sand, consisting of 
sands indurated in places, and with Rhynchonella ; overlaid by 
shelly and sandy limestones (2 ft. 8 in.) ; and by brown and grey 
iron-shot limestones (about 4 feet). These beds are not distinctly 
separated, for they merge in places one into the other. They 
afford evidence however 'of the zones of A. Murchisonce and A. 
humphriesianus: the following fossils having been obtained | : 
* Inf. Ool. Gasteropoda, p. 51. 
f Ibid., pp. 51, 52. 
See also Hudleston, Ibid., p. 53. 
