130 E. M. Brydone — Further Notes on the Trimmingham Chalk. 



ClRRHIPEDIA. 



BracJnjlepas cretacea, H. "Woodw, Scalpellum maximum, Sow. 



TolUeipes glaber, Kom. 



POLYZOA. 



Somalostega pavonia. Hag. Pachydcra grandis, Mares. 



Membranipora clathrata, Reuss. Porinafilograna, Goldf. 



Many others of (at present) unknown zonal significance. 



Brachiopoda. 

 Crania Egnabei-gensis, Retz. Terebratida carnea, Sow. 



C. Parisiensis, Defr. f. obesa, Sow. 



Magas pumiliis, Sow. (very common). T. se.rradiata, Sow. 

 Phynchonella limbata, Sclilotli. Terebratulina striata, 'Wahl. 



Ph. plieatilis, Sovf. Thecidium Wetherelli, Morris. 



Ph. Peedensis, Eth. 



Lamellibranchiata. 

 Avicula ccerulescens, Nilss. Pecten pulcheUus, Nilss. 



Inoceramus sp. P. qiiinqxecostatKS, Sow. 



lima grauulata. Nilss. P. undidatus, Nilss. 



L. pectinafn, D'Orb. Plicatula sigUUna, S. P. Woodw. 



Ostrea canalicidata, Sow. Spondyhts Diitempleanns, D'Orb. 



0. i)i(pqiiicostata (?), S. Woodw. iS. lafus, Sow. 



0. vesictdaris, Lam. S. spinosus. Sow. 



Pecten crefosKs, Defr. 



Cephalopoda. 

 Aptychus nigostis, Sharpe. Belemnitella mucronata, Schloth. 



Pisces. 

 Pnchodtcs sp. 



It is perhaps desirable to mention that these fossils come mainly 

 from the western part of this chalk, i.e. about Sheringham and 

 Wej'bourne. It may be partly owing to the greater facilities for 

 collecting offered by the cliflf exposures near Weybourue, but I have 

 no doubt that it is also due to a genuine increase in the abundance of 

 fossils as we get away from Cromer, where the chalk is wonderfully 

 barren. Travelling in this direction, we are, according to Mr. Eeid, 

 passing from newer to older chalk, but I have great doubts about 

 this. The only argument he adduces to support this view is that the 

 dip of the chalk in the cliifs near Wej'boui-ne is to the east, and may 

 be assumed to continue all the way (there certainly does not appear 

 to be any traceable dip in any direction in the chalk on the foreshore). 

 I have always doubted the existence of this steady eastward dip,, and 

 when in 1903 the chalk near Weybourne was exceptionally well 

 exposed after a storm I studied it verjj^ carefully. I was able to 

 trace the lines of flint very minutely, and I was absolutely convinced 

 that for nearly three-quarters of a mile from Weybourne Gap the 

 lines of flint are dipping steadily to the west. I have also observed 

 indications that there is a syncline at West Eunton, and not very far 

 away a chance hole in the chalk with vertical sides showed a section 

 across a flint line apparently lying in a small anticlinal. I am 

 therefore more inclined to regard this chalk as, at any rate, 

 undulating, if not actually dipping westward on the whole. The 

 fossils of the chalk around Weybourne show a tendency towards the 

 Trimmingham fauna, and it would be remarkable if between that 

 chalk and the Trimmingham Chalk there really lay the very 

 unfossiliferous chalk nearer Cromer. 



