102 T. Mellard Reade — Post-Glacial Geology. 



Discorhina tulerculata, B. k "W. Very rare. 



* Truncatnlina lobatula (W. & J.). Very common. 

 Fulvinulina Karstmi (Rss.). Eare. 



* ,, sp. near auricula (F. & M.). Eare. 



* Eotalia Beccarii (Linno) . Very common. 



* Nonionina depressitla (W. & J.). Most abundant. 



,, pauperata, B. & W. Common. 

 ,, turgida, "Will. Very rare. 

 ,, steUigera, D'Orb. Eare. 



* Folystomella stnato-2mnetata (F. & M.). Most abundant. 



Ostracods very common. 



The Foraminifera in tliis gathering are very similar to those- 

 obtained from the previous sample (No. 3). Medium-sized specimens 

 of Botalia Beccarii, Nonionina depressula, and Folystomella striato- 

 punctata occur in great profusion, the other species being for the 

 greater part small or very small in size. 



No. 5. Boulder-clay. Weight of clay, 28 oz. troy. After washings 

 2-6 oz. fine ; "65 oz. coarse. The greater portion of the stones more 

 or less rounded. Foraminifera frequent. 



FOEAMINIFEEA. 



Miliolina semimclum (Linne). One specimen. 

 Bolivina plicata, D'Orb. Very rare. 

 Cassidulitia crassa, D'Orb. Very rare. 

 Lagena sulcata ("W. & J.). One specimen. 



,, Icevigata (Ess.). Very rare. 

 Cristellaria rotulata (Lamk.). One specimen. 

 Globigerina bnlloides, D'Orb. One specimen. 

 Discorhina rosacea (D'Orb.). One specimen. 

 Botalia Beccarii (Linne). One specimen. 

 Nonionina depressula ("W". & J.). Common. 

 Polystomella striato-punctata (F. «&; M.). Frequent. 



The species marked with an asterisk occur in one or other of 

 the Heyst deposits of the new Bruges Canal, viz. the " Argile 

 des polders superieure," the " Cardium Sand," or the " Scrohicidaria 

 plana (piperata) Clay." Some of the Boulder-clay forms also occur 

 in the Heyst deposits, but these are not marked, as it is wished to 

 confine the comparison to beds of the same age. 



A comparison of this list of Foraminifera, consisting of 68 species 

 in all, with that of the Bruges beds already referred to, shows that 

 there are 34: or half of the species in common. Globigerina cretacea, 

 a notable form v/hich is common to both, does not occur as a recent 

 species in the British Isles, and in consequence Mr. Wright thought 

 that those in the Bruges silts were not native to the deposits, but 

 derived from Cretaceous beds in the neighbourhood. The discovery 

 of Globigerina cretacea in abundance in the Leasowe under-clay 

 shows that the species are here indigenous, as there are no Cretaceous 

 beds in Cheshire or adjoining counties from which they could be 

 derived. 



Mr. Wright also observes that the interiors of Foraminifera from 

 our Chalk are filled with silica, so that when placed in muriatic acid 



