xii. EGHINODERMATAANNELLIDA. 301 



resumed its sway for an equal ' Kimmeridgian' period after the 

 coralline deposits ceased. In neither of these clays is coral of any 

 sort other than a very rare occurrence, and the only species yet 

 recognized belongs to the small genus Anabacia. 



ECHINODERMATA. 



Echino'idea. 



Acrosalenia spinosa. Ag. 0. C. St. Clement's. 



Cidaris florigemma. Phil. C. G., C. O. Bullingdon, Heddington, Cumnor. 

 insperata. n. s. Phil. 0. C. St. Clement's. 

 Smithii. Wr. C. G., C. 0. Heddington. 



Clypeus subulatus. Y. and B. C. O. Heddington. 



Echinobrissus dimidiatus. Phil. C. G. , C. 0. Heddington, Cowley, &c. 



Hemicidaris intermedia. Flem. C. O. Heddington. 



Hemipedina Marchamensis. Wr. C. G. Marcham. 



Pseudodiadema versipora. Phil. C. 0. Heddington. 



Pygaster umbrella. Wr. C. 0. Heddington. 



Pygurus Blumenbachii. Koch and Dunk. C. 0. Bullingdon. 

 costatus. Wright. C.O. Bullingdon. 

 pentagonalis. Phil. C.O. Heddington. 

 Astero'idea. 



Astropecten rectus. C. G. Cowley. 

 Crino'idea. 



Apiocrinus. . . . C. 0. Heddington. 



Extracrinus. 0. C. St. Clement's. 



Millericrinus echinatus. Schl. C. 0. Heddington. 



This very small series of the Echinodermata has not been ob- 

 tained without much research in the strata near Oxford. The 

 rarity of Hemicidaris, Pseudodiadema, and Pygurus makes a great 

 difference to collectors at Oxford and Calne. 



Of these fossils only a few rare traces occur in the clay beds 

 round Oxford, nor are such found in plenty or variety in other 

 parts of this argillaceous series. It is rather in the shelly (middle) 

 series than in the purely (upper) oolitic parts of the coralline 

 rock that they are to be looked for. 



FOSSILS OF THE OXFORD OOLITE SERIES. 



ANNELLIDA. 



Serpula runcinata. Sow. C. 0. Heddington. 



squamosa. Phil. C. 0. Cumnor. 



tricarinata. Sow. C. 0. Heddington. 

 Vermicularia ovata. Sow. C. 0. Heddington. 

 Vermilia sulcata. Sow. C. O. Heddington. 



