INFERIOR OOLITE SERIES : SHERBORNE. 79 
tilus, Belemnites, Pleurotomaria, Lima Etheridgei, &s. Tn the 
central portions there occur A. humphriesianus, Astarte excavata, 
A. obliqua, Gervillia, Ceromya bqfociana, &c. ; and in the upper 
portions small examples of A. Parkinsoni, Terebratula Phillipsi, 
and T. spheeroidalis. 
There is no lithological distinction whereby the zones can be 
distinctly separated ; but evidently the base of the zone of A. 
Parkinsoni is incorporated in the upper part of the ironshot-beds, 
as we find to be the case in places near Bridport. The section 
above noted is probably the one called " Louse Hill " quarry by 
Mr. Hudleston.* 
The opening known as Frogden quarry, at Oborne near Sher- 
borne, showed the following section : 
FT IN. 
Zone of 
Ammonites 
Parkmsoni. 
Zone of 
A. humphries- 
Pale-grey and brown limestones and 
marls with Rhynchonella spinosa, 
Terebratula sphceroidalis - - 8 6 
Iron-shot oolites : Beds with Ammonites 
Martinsi, A. garantianus, A. nior- 
tensis, A. cadomensis (" Cadomensis- 
bed ") , Astarte, T. sphceroidalis 2 
Beds with A. humphriesianus, A. Slag- 
deni,Limapeetiniformis,&G.- 3 
Bed of pale limestone with green 
grains; with A. Sauzei, Plewroto- 
maria, &c. - 6 
Zone of J Hard bluish-grey shelly limestones and 
A. Murchisonce\ marls - 2 
Midford Sand. Yellow calcareous sandstone. 
The zonal grouping is based on that of Mr. Hudleston.t Here 
again we see the close connection between the zones of A. hum- 
phriesianus and A. Parkinsoni, the top iron-shot bed containing 
species that link them together. Ammonites Sauzei, as observed 
by Mr. Hudleston, is so rare that the term " Sauzei-bed " is a 
misnomer : the layer has mixed relations with the beds above and 
below. Nowhere else in this country, excepting at Dundry, has 
any distinctive development of this stage been recognized. 
Passing on to the neighbourhood of Milborne Week (or 
Wyke), there is a road-side section, rather less than 2 miles 
N.N.E. of Frogden quarry, Oborne, to which 'attention has been 
directed by Mr. Hudleston. The lower beds comprise 3 feet of 
sandy limestones ; and above them there occur 18 inches of soft 
white limestone, containing Ammonites humphriesianus and A. 
Braikenridgei in the lower part, and Terebratula sph&roidalis in 
the upper part.J 
* Gasteropoda of Inf. Oolite, p. 46 ; and Buckman, Quart. Journ. Geol. Soc., 
vol. xlix. p. 488. 
f Inf. Ool. Gasteropoda, p. 47. See also S. S. Buckman, Inf. Ool. Ammonites, 
pp. 8, 10, and Quart. Journ. Geol. Soc., vol. xxxvii. p. 589, vol. xlix. p. 500. 
Inf. Ool. Gasteropoda, p. 50 ; see also S. S. Buckman, Rep. Brit. Assoc. for 
1891 (1892), p. 655. 
