THE FORAMINIFERA. OF THE EXE ESTUARY. 



339 



Discorhina rosacea 

 Tr'uncahdina lohatula 

 Texhdaria gramen 

 Rotalia heccarii 



For each 1,000 found by 



actual count. 

 12 or 1'2 per cent. 



10 „ 1 

 6 „ 0-G 

 U„ 0-15 „ 



It would therefore appear as though PolystomeUa driato-imndata 

 were 113 times more numerous than Rotalia heccarii, although both 

 would really be present in equal numbers. 



Undoubtedly some of the Lagena, Nodcomria, and Bolivina float better 

 than PolystomeUa, but exact figures have not been ascertained ; the above 

 table is itself somewhat tentative. Meanwhile, numerical results from 

 floating are still of value as giving the relative abundance of any one 

 species in different samples. 



Sample taken just above low- water mark, on the north shore of the 

 Warren, about 150 yards west of Saltliouse Lake stream. 



176 



A SAMPLE taken at the same place but under low-water mark con- 

 tained but few Foraminifera, and the results would only be possibly 

 misleading. 



* Provisionally attributed to Pohjmorplnna. This species will form the subject of further 

 inquiry. 



