No. 5.] DAWSON— PORAMINIFERA, MANITOBA. 257 



through nearly the same set of forms as those there rcproscnted 

 The Coccohths a^re* with those figured in the s.n.e place .xactly 

 and also with th'^.e found in the English chalk and recent seas' 

 They are in a remarkably good state of prcgervation The 

 average diameter of the large/ aiauQg them is about -008 milJi- 

 metres which .,rees very n-arlr with that of those fonnd in 

 other places. Dr. Gumbel ha« discovered Coocoliths i„ lime 

 stones of many ages, and they appear, thuMgh .-> minotc even in 

 comparison with the Foraminifera, to have pky.d no unimpor- 

 tant part m the fixation of calcareous matter, .uui the building 

 up of the crust of the earth. 



