54 



SERPULA plana. 



TAB. DCXXXV.— /g^.4. 



Spec. Char. Attached, involute, discoid^ smooth ; 

 base broad ; aperture slig-htly expanded, 

 nearly circular. 



Syn. Serpula plana, JVoodward, Geol. Norfolk, 

 t. b.f. 9. Morris, Catal. 66. 



A SMALL shell with only one or two turns ; it is smooth, 

 excepting a few sharp ridges produced by the expanded 

 lip at successive periods of growth. 



From Portsdown, Kent. Woodward's specimens were 

 from Eastern Norfolk. 



SERPULA pusilla. 



TAB. DCXXXV.— ^g-. 5. 



Spec. Char. Attached in part, involute, subdis- 

 coid ; the free portion erect, cylindrical ; base 

 expanded; surface obscurely granulated; 

 aperture slightly contracted. 



A SMALL shell from the chalk of Norwich ; it is attached 

 to a young Exogyra globosa. The granulations are obscure 

 and arranged in lines. 



SERPULA Turbinella. 



TAB. DCXXXV.— /g-. 6. 



Spec Char. Wound into the form of an elon- 

 gated cone attached by its apex ; surface 

 nearly smooth ; whorls flattened, aperture 

 contracted. 



r ROM Portsdown, with S, lliiim. 



