122 THE LIASSIC PERIODS. CHAP. 



Pentacrinus basaltiformis. Mill. L. Badgworth, Frethern, Treddington. 

 Goldf ussi. M'Coy. L. Mickleton Tunnel. 



punctiferus. Quenst. L. Vale of Gloucester. 



robuatus. Wright. M. Hewlett's Hill, Cheltenham. 



scalaris. Gold/., Buckm. L. Vale of Gloucester. 



tuberculatus. Mitt. L. Pyrton. 



Astero'idea. 



Acroura Brodiaei. Wright. 



Ophioderma Gaveyi. Wright. M. Mickleton Tunnel, Hewlett's Hill, Cheltenham. 



Ophiolepis Ramsayi. Wright. L. Pyrton. 



Tropidaster pectinatus. Wright. M. Mickleton Tunnel. 



Uraster Gaveyi. Wright. M. Mickleton Tunnel. 



Echinvidea. 



Acrosalenia minuta. Buckm. L. Cheltenham, Mickleton. 



crinifera. Wright. U. Gloucestershire. 

 Cidaris Edwardsii. Wright. L. Fenny -Conipton, Honeybourn. M. Alderton. 



U. Dumbleton. 



Diadema . . . sp. L. Harbury. 

 Hemipedina Tomesii. Wright. L. Wilmcote. 

 Pedina . . . sp. L. Wright. Vale of Gloucester. 

 Pseudodiadema Moorei. Wright. U. Vale of Gloucester. 



The whole series of liassic Echinodermata differs generically from 

 the palaeozoic predecessors of the group. New crinoids, asteroids, 

 and echinoids mark the advent of these mesozoic strata a large 

 proportion of the genera are continued into the oolites. It is 

 chiefly to Dr. Wrighfs Memoirs in the volumes of the Palseonto- 

 graphical Society that we are indebted for our knowledge of the 

 species and their distribution. 



FOSSILS OF THE LIASSIC PERIOD. 



ABTTCULATA. 



Annellida. 



Serpula plicatilis. Goldf. M. Uley, Gloucestershire. O. G. S. 



flaccida. Goldf. M. Stinchcombe, Gloucestershire. O. G. S. 

 limax. Goldf. L. Vale of Gloucester. 

 socialis. Goldf. L. Fenny-Compton. 



Cirripedia. 

 Pollicipes. L. Mickleton Tunnel. 



Crustacea. 



C. Isopoda. Aega. L. Mickleton. 



C. Entomostraca. Estheria minuta. K. Westbury, Wainlode, Harbury, c. 



Cytherina liassica ? L. Down Hatherley. 

 C. Decapoda Macroura. Coleia. R. Westbury Cliflf. U. Gloucestershire. 



Eryon Barrovensis. M'Coy. L. Wilmcote. M. Dumble- 

 ton. 



