304 JURASSIC. 



Benjamin Richardson, at Berfield, to the north of Bradford;* and 

 subsequently a most extensive collection of the characteristic 

 'Bradford Encrinites' was made by Dr. J. Chaning Pearce.^ These 

 fossils are known also as Pear Encrinites, ' Peg-tops ' and ' Coach- 

 wheels,' from the fancied resemblance of the body and portions 

 of the stalk of the Crinoid to those objects : they form parts of 

 the Apiocrinus Parkinsoni, which evidently attached itself to the 

 surface of the Great Oolite. 



Among the fossils, Brachiopoda are conspicuous, and the bed has 

 been termed the zone of Ttrcbratula ( Waldkeiinia) digona : perhaps 

 the more characteristic form is Terehratula coarctata {decussata) ; T. 

 maxiilaia, T. Bradford ietisis, Waldheimia cardium, Rhyncho7iella varians, 

 R. cottcin?ia, and other forms occur; also Avicula costata, Ostrea gre- 

 garia, O. Soivcrbyi, Mytilus asper, Serpula, Acrosalenia, Cidaris, and 

 A^itedon prisca (one of the ComattdcB)? 



Although the Bradford Clay is generally considered to be a local 

 deposit in the district between Bradford-on-Avon and Cirencester, 

 the fauna is represented in Dorsetshire, from specimens collected 

 by Mr. J. F. Walker, Mr. Darell Stephens, and Mr. R. Damon, at 

 Radipole, near Weymouth, etc.^ At West Cliff, Bridport Harbour, 

 the upper part of the cliff is formed of Forest Marble, exhibiting 

 a mass of shell-limestones ten or twelve feet in thickness, over- 

 laid by thirty feet of clays, shaly and thin flaggy limestones, and 

 underlaid by similar beds about fifty feet in thickness. At the base 

 of these lower clays is a hard brown sandy marl, one foot or more 

 in thickness, containing many fossils. The same bed occurs east 

 of Burton Bradstock, and at Herbyleigh, near Weymouth ; and it 

 appears to represent the Bradford Clay. At Eype a conspicuous 

 band of hard pale marl occurs below this bed, marking the junction 

 with Fuller's Earth. (See Fig. 40, p. 252.) Rhynchonella Boueti, 

 Terehratula intermedia, var. Langtonensis, Waldheimia obovata, as well 

 as R. varia7is, T. coarctata, T. maxillata, W. digona, etc., are found 

 at these localities. 



]Mr. Walker has obtained a variety of Rhynchonella spinosa from 

 the road-cutting below the Great Western Railway at Tetbury 

 Road, near Cirencester.^ In this neighbourhood the Bradford 

 Clay is represented by three to ten feet of yellow marl, and from 

 it Dr. S. P. Woodward obtained 105 species of fossil marine 

 organisms." 



The Forest IMarble forms a prominent escarpment in Dorsetshire, 

 at Lillington Hill south of Sherborne, and to the west of Stalbridge 

 and Wincanton. 



1 Townsend, Character of Moses, p. 268. 



2 Proc. G. S. i. 484 ; see also P. Geol. Assoc, ix. 165. 



3 P. H. Carpenter, Q. J. xxxvi. 54. 



* Damon, Geol. Weymouth, 1884, p. 15; T. Tavidson, Supp. to Jurassic 

 Brachiopoda (Palccontogr. Soc), p. 156; T. Wright, Q.J. xii. 310; see also 

 P. Geol. Assoc, ix. 207. 



5 G. Mag. 1S70, p. 299. 



6 Proc. Cotteswokl Club, i. 6 ; J. Buckman, Q. J. xiv. 117. 



