302 THE OXFORD OOLITE PERIOD. CHAP. 



CRUSTACEA. 



Glyphea rostrata. Phil. C. 0, Heddington. 



Strickland!. Bean. 0. C. St. Clement's. 

 A short-tailed Decapod. 0. C. St. Clement's. 



POLYZOA. 



Diastopora diluviana. 0. C. St. Clement's. 



The rarity of polyzoa in the Oxford oolites and clays is some- 

 what remarkable, and appears to be in some way related to the 

 even more remarkable rarity of brachiopoda, on whose shells in 

 the Bath oolites so many of these beautiful objects are found. 



BRACHIOPODA. 



Discina latissima. Sow. 0. C. St. Clement's. 



radiata. Phil. C.O. Bullingdon. 

 Rhynchonella varians. Dav. O. C. Summertown. (rare.) 

 Terebratula bucculenta. Sow. C. 0. Bullingdon. 

 impressa. Von Suck. O. C. Oxford. 



insignis. Schul. C. O. Heddington, Cumnor. 



The scarcity of these fossils in the Oxford oolites and clays 

 contrasts strongly with the abundance of them in the parallel 

 older series below. Till lately our collection did not possess a 

 single terebratula from the coralline oolite, and though now two 

 species are in the catalogue, one is founded on a unique valve; 

 and still we have no rhynchonella and no lingula from this rock. 



MONOMYARIA. 



Avicula expansa. Phil. C. 0. Heddington. 



ovalis. Phil. C.O. 



Gervillia aviculoides. Sow. C. 0. Heddington, Bullingdon. 

 Gryphsea dilatata. Sow. 0. C. St. Clement's, &c. C. 0. Heddington. 

 Lima elliptica. Whit. C. 0. 



Iseviuscula. Sow. C. O. Heddington. 

 pectimformis. Schl. C. O. 



rigida. Sow. C. O. Heddington. 

 rudis. Sow. C.O. Bullingdon. 

 rustica. Sow. C.O. Heddington. 

 Ostrea gregarea. Sow. 0. C. u. St. Clement's. C. 0. Heddington, &c. 



solitaria. Sow. Bullingdon. 



spinigera. n. s. C. 0. Bullingdon. 

 Pecten articulatus. Schl. C. 0. Heddington. 



fibrosus. Sow. 0. C. Summertown. 



lens. Sow. C.O. Heddington. 



similis. Sow. C. 0. Heddington. 



vagans. Sow. C. 0. Cumnor. 



vimineus. Sow. C.O. Heddington, Cumnor. 



