326 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Juiie 15, 



The freestones are not continuous, and, with the associated shelly 

 rags and overlying marl, are lost beneath the level of the line towards 

 the south end, near to the point above where the mass of drift first 

 appears, the intermediate space being occupied with the shelly beds 

 and zones of Terehratidce. Between the oolite, and partly separating 

 it from the drift, is a ferruginous band and about 7 feet of sandy clay 

 and shale, the remnants merely of a thicker series of strata hereafter 

 described (fig. 1, 1,2,3). 



In the follovring table are enumerated the shells which have been 

 obtained from the upper shelly beds of this cutting ; among the most 

 abundant are Pecten lens, Lucina despecta, two or three species of 

 Area, Opis, Taneredia, Astai'te, and also Cei'itkium and Nerineea. 

 Corals, Bryozoa, and Echinoderms were very rare. 



Table I. — List of the Testacea of the Upper Shells/ Beds at Pon- 

 ton, Lincolnshire ; and their Distribution in the Great and In- 

 ferior Oolite of Yorkshire and Gloucestershire. 



Pterocera (Alaria) armata, Lycett S)- Morris 



Cerithium gemmatum, Bean 



limBeforme, Rbmer 



Beanii, Lycett Sf Morris 



Nerinsea Voltzii, Deslong 



funiculus, Deslong 



fPhasianella Pontonis, Lycett, n. sp 



cincta, Phill 



Leymeriei, D'Arch 



latiuscula, Lycett ^ Morris 



Acteoniua glabra, Phill. sp 



Cylindrites gradus, Lycett 



t turriculatus, Lycett, n. sp 



Natica adducta, Phill 



Gomondii, Lycett 



Rissoa obliquata, Sow 



cancellata, Morris Sf Lycett 



Turbo Labadyei, D'Arch 



elaboratus, Bean 



Phillipsii, Lycett Sf Morris 



t gemmatus, Phill ". . . 



Monodonta Lyelli, D'Arch 



discoideum, Lycett Sf Morris 



Trochus monilitectus, Phill 



spiratus, D'Arch. 



Acis, D'Orh. (Inf. O. France) 



Belus, D'Orb. (Gr. O. France) 



t-^- — ornatissimus, D'Orb. (Inf. O. Fr.), var. 



Pleurotomaria reticulata, ? Deslong 



Trochotoma extensa, Lycett 



Rimula clathrata. Sow 



Patella rugosa, Sow 



tTancredia axiniformis, Phill. sp 



t angulatai Lycett 



York 



ihire. 



Glo'sie 



Gr. 0. 



Inf. 0. 



Gr. 0. 



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