630 



DYNAMICAL GEOLOGY. 



which are here given (figs. 66-7S), besides three of Rhizopods. The names of 

 the Diatoms are as follow : — 



Figs. 1-78 (858-936). 

 8^n^ 9 — »<>- 



Diatoms and other microscopic organisms of a dust-shower. 



Figs. 1, 2, Melosira granulata ; 3, M. decussata ; 4, 31. Marehica ; 5-7, 31. dia- 

 toms; 8, 9, Coseinodiscus atmospherica ; 10, Coscinodiscus ? ; 11, Trachehmonas 

 levis ; 12, Campylodiscus Clypem ; 13-15, Gomphonema gracile ; 16, 17, Coccone- 



