172 



GKOLOiiY OF THE ISLE OF WIGHT. 



here, and uninjured specimens are sometimes washed up by 

 the sea. 



At the foot of the chfF. half way between WhiteclifF Point and 

 Foreland Point^, just beyond the place where the oyster bed is 

 best displayed on the shore, the strata immediately surmounting 

 the septarian stone-band are well exhibited. Dark blue clays, 

 with scattered shells (double) of Ci/rena ohtusa and C. ohovata 

 first apnear. Then come darker and more friable shaly clays, 

 including; a strongly marked band of Ci/rcnce, the species being 



Fig. 57. 

 Cyrena pulchra. Sow. 



C. -pulchra (Fig. 57) ohtusa, and obovata, mingled with occasional 

 large examples o£ Cerithium mutahile (Fig. 58) of which now and 



Fig. 58. 

 Cerithium. mutahile, Lam. 



then a specimen may be found with a Balanus attached. After 

 some pale laminated clays, containing the same shells, succeeded 

 by greenish marls, crowded with little knots of Serpulce, clays and 



