52 



THE GEOLOGIST. 



Cv.cv.UcBa glabra . . . 



Shanklin and Peasemarsh . 



Pare. 



Cyprina angv.lata . . . 



Hvthe and Sandgate. 





C. rostrata 



Atlierfield. 





Ci/tkerea f Venus) caper ata Atlierfield. 





Venus fab a 



Shanklin and Peasemarsh . 



Common. 



V. oralis 



Peasemarsh 



Pare. 



Exogyra v.ndv.lata . 





Pare. 



Grervillia anceps 



Peasemarsh. 





G-. lanceolata .... 



Atlierfield. 











Lima semisv.lcata . . . 





Common. 



Nucufa antiquata . 



Atlierfield. 





N. impressa 



Parham Park. 







Shanklin. 





N, oltusa 



Atlierfield. 





Tellina inceqv.alis . 



Shanklin and Peasemarsh. 





T. (Psammobiaj sti'iatula 



Shanklin and Peasemarsh. 





Thetis minor 



Shanklin and Peasemarsh . 



Common. 



Trigonia d.ad.alaa . 



Parham Park. 





T. spectabilis - 







T. caudata 



Atlierfield. 





Litiorina pungens . . . 



Peasemarsh. 





L. conica 



Peasemarsh and Shanklin . 



Common. 



L. CSatica) monilifera 



Peasemai'sh . 



Pare. 



L. CSaticaj rotv.ndata 





Common. 



Phasianella fonnosa . . 



Peasemarsh 



Pare. 



P. striata 



Peasemarsh 



Pare. 



Turbo munitus .... 







^Nautilus elegans 



G-odalming. 





Dentaliv.m medium . ... 



Peasemarsh. 





Serpv.la filiform is . 



Shanklin. 





S. plexus 







Vermetv.s polygonalis . 



Hvthe and Sandgate. 





From the above list., it is apparent that the Upper Greensand and Gault 

 fossils which oocur at Blackdown are but few, and of small value when 

 compared with those of the Lower Greensand. 



There are circumstances connected with the accumulation and deposition 

 of the strata forming the Lower Greensand generally, which may also be 

 taken into account in considering this question ; some of which I shall now 

 proceed to notice. 



It has been shown by Dr. Fitton, that the Lower Greensand. wherever 

 fully developed, is separable into three groups or series of strata ; each dif- 

 fering somewhat from the others in mineral character, and each possessing 

 a fauna more or less peculiar to itself. ]N"ow. although the limits of each 

 are not everywhere traceable, yet there is always a sufficient distinctness 

 between them to warrant the belief that the same causes, whether of up- 

 heaval or depression, acted throughout the entire British area then covered 

 by the Greensand ocean. 



In the neighbourhood of Godalming this subdivision is, perhaps, more 

 strongly marked than is usually the case. The lower ]S"eocomian clays are 

 here found, as elsewhere, resting conformably upon the TYealden. They 

 are succeeded by a series of strata, composed, for the most part, of tine 

 sand, mingled with more or less argillaceous matter, and including occa- 

 sional bands of loose, concretionary sandstone ; this latter being, appa- 

 rently, a local equivalent of the Kentish rag of ATaidstone. All these 

 appear to have been deposited quietly and continuously, and form, includ- 



