INFERIOR OOLITE SERIES: BRIDPORT. 57 
The thickness ?een is nearly 150 feet, but in this case the base 
is not expo?ed. 
Traces of Inferior Oolite cap the Sand in East Cliff, Bridport 
Harbour; but these higher beds are best shown to the east of the 
river Bride (or Bredy), in the cliffs of Burton Bradstock. The 
higher strata are not accessible, hence the majority of the fossils from 
this celebrated locality, have been collected from the fallen masses 
of rock on the beach. The Inferior Oolite is capped by the 
Fuller's Earth, and we have the full thickness, which does not 
exceed 15 feet. Huge masses of rock occasionally break away 
from the cliffs?, and from these it is possible to measure portions of 
the beds, and to collect fossils, with due attention to the strati- 
graphical position. (See p. 51.) 
A few years ago a deep cutting was made for the road leading 
from Burton Bradstock to the shore, and here the beds down to 
the sands, could be examined in situ, and measured in detail. It 
is not, however, possible to make any extensive excavations in 
search of fossils, although when the cutting was made a fine series 
of specimens was obtained by Dr. M. Poignand.* Thus the 
collector must still devote his attention to the fallen blocks on the 
beach, and to the shallow quarries that have been opened up, a 
little way inland, between Bridport Harbour and Burton Brad- 
stock. 
Some confusion at one time arose from the application of the 
name " Cephalopoda Bed " in Dorsetshire. There is indeed in 
this county no band corresponding in character with the 
Gloucestershire Cephalopoda Bed ; but the mass of the Inferior 
Oolite itself is a series of Cephalopoda Beds, for the zones of 
Ammonites Murchisonce., A. humphriesianus, and A. Parkmsoni 
are locally very fosfiliferous, and constitute rich fossil-beds at 
different horizons. These facts were not recognized by Dr. Wright 
in his papers on the subject/f- consequently his determination of 
horizons, and his lists of species, have required considerable revision. 
To some extent order was re-established by Prof. Buckman,J but 
we are mainly indebted to his son, Mr. S. S. Buckman, whose 
observations have been confirmed and further illustrated by Mr. 
Hudleston.|| Among the species recorded by Dr. Wright from 
the so-called Dorsetshire Cephalopoda Bed, " A mmonites jurensis " 
is the form named A. \Lytoccras) confusus by Mr. Buckman ; 
while the " A. dorsetensis " of Dr. Wright is simply a variety of 
A. Parkinsoni. 
The following is a general section of the beds at Burton 
Bradstock : 
* Proc. Geol. Assoc., vol. ix. p. 204. 
f Quart Journ. Geol. Soc., vol. xii. p. 312 ; vol. ivi. p. 47. 
J Ibid., vol. xxxv. p. 737. 
Ibid., vol. xxxvii. p. 588. 
fj Proc. Geol. Assoc., vol. ix. p. 187. 
