Vol. 52.] 



PLIOCENE DEPOSITS OP HOLLAND. 



757 



Of the 90 species just named 28 are extinct, 19 are southern, 

 and 2 northern. Most of them, it will be observed, are 

 abundant in the Belgian beds. 



This list shows the close resemblance between the Scaldisien and 

 Poederlien. The principal difference between them is that in the 

 latter occur, though not abundantly, the dextral form of Trophon 

 (Chrysodomus) antiquus, and the northern species Tr. gracilis and 

 Tr. despectus. 



Table B. 



Extinct or Southern Species found in the Scaldisien or Poederlien 

 of Belgium, but not in the Amstelien or at the Butley horizon of 

 the Red Crag. (Atl.= Atlantic.) 



Gasteropoda. 



Trophon alveolatus, Sow 



Cancellaria mitrcsformis, Broe. 



Nassa prismatica, Broc 



„ lamellilabra, Nyst 



Murex Duponti, Nyst 



„ vicmus, Nyst 



Cancellaria Lajonkairei, Nyst . 

 ,, umbilicaris, Broc. . 



Columbeila subulata, Broc 



t „ sulcata, Sow 



Pleurotoma f estiva, Homes 



„ gracilis, Mont 



„ hystrix, Jan 



,, incrassata, Duj 



„ perpulchra, Wood . 



,, similis, Nyst 



„ subulata, Nyst 



fJDrillia crassa, A. Bell 



,, crispata, Jan 



Hoedropleura Delheidi, Vin 



JS'atica cirriformis, Sow 



„ intermedia, Phil 



Turbonilla similis, Wood 



„ semistriata, Wood . 



Eulima subulata, Don 



Pyramidella plicosa, Brown .... 

 Ccecum trachea, Mont 









+ 



+ 



+ 



t These are reported from Butley by Mr. A. Bell, but are not recognized 

 Butley fossils by Mr. Wood or Sir J. Prestwich. 



