James Saunders — Geology of S. Bedfordshire. 



125 



Species. 



Hippurites Mortoni ... 

 Cypricardia trapezoidalis 



Pleurotomaria pcrspectiva ? 

 Turbo gemmaius 

 Trochus (cast) 



,, sp. nov. 

 Natica (cast) 

 Cinulia (cast) 

 Helicoceras, sp. nov. 

 Scaphites Geinitzia ... 

 Ammonites prosperianns 

 Nautilus hcvigatus 

 Belemnitella mucronata, var. quaa 

 Rhyncliolitcs ... 

 Ptychodus mammilaris 



,, latissimus 



,, sp. ? 

 Etichodus ha foe von ... 

 Corax heterodon (from Harpenden 

 Lamna acuminata ... 

 Otodus appendiculatus 



>> S P 



ata 



Herts) 



Fossils from the Chalk Rock between Luton and Chiltern Green, 

 other than those mentioned above, in the Collection of Dr. Morison. 

 See " Trans. Herts Nat. Hist. Soc. vol. v. Dec. 1889." 



Ventriculites radiatus 



, , muricatus 

 Camcrospongia campanulata 

 Cephalites perforata 

 < 'oscinopora infwndibuliformis 

 Plocoscyph ia convoluta ' 

 Polyjcrea, sp. 

 Guettardia deltata 



, , stellata ? 

 Placotrema cretaceum 

 Micr'aster breviporus 



,, cor-bovis, var. 

 PLolaster planus 



, , trecensis 



,, sp. nov. 

 Cijph osoma radiatum 

 Serpula plexus 

 Balanus, sp. 

 Mhynchonella Mantelli 

 Terebratula biplicata 



, , camea 



Ostrea Normanniana ? 

 Lima Soperi 

 Inoceramus lotus 



,, mytiloides 

 Mytilus, sp. ? 

 Area galliennia 



sp. 

 Cardita tenuicosta ? 



sp. 

 Trochus JLtrcaisi 

 Avellana, sp. 



Rostellaria (two undetermined sps. 

 Turritellu, sp. 

 Ammonites varians ? 

 Scaphites cequalis 

 Baculites, sp. 

 Ancyloceras, sp. 

 Heteroceras, sp. 

 Twrrilites senequierianus ? 

 Corax falcat us (tooth) 



Fossils from the Melbourn Eock (Middle Chalk) and Belemnitella 



PLENA ZONE (LOWER CHALK) BETWEEN LeAGRAVE AND LuTON. 



Melbourn Rock. 



Ostrea vesicularis, var. Baylei. Abundant. 

 Belemnitella plena zone. 



Bhyuchonella Cnvieri. 



,, plicatilis. 



Zipas (Crustacean). 



Ostrea reticularis, var. Baylei. 

 Ptychodus decurrens. 

 Lamna gracilis. 



