21, 
"Generally speaking the material has a very low content of dia- 
toms and limited to a relatively small number of species, Considering 
the material is classed as 'Recent Marine! one would expect the frustules 
to be quite robust and perfect but this is not the case for many are frac- 
tured and are only feebly endowed with silica, I can only presume the 
regions from which the materials were gathered are not productive to 
diatoms as are the two Arctic seas," 
The following species were determined: 
Coscinodiscus radiatus Triceratium arctium 
Coscinodiscus robustus Triceratium favus 
Coscinodiscus lineatus Hyalodiscus stelliger 
Coscinodiscus denarious Hyalodiscus subtilis 
Coscinodiscus occulus iridis Actinoptychus glabratus 
Coscinodiscus excentricus var, major Actinoptychus ralpii 
Coscinodiscus subtilis Actinoptychus vulgaris 
Coscinodiscus gigas Melosira sulcata 
Coscinodiscus excentricus Navicula lyra 
Coscinodiscus perforatus Euodia atlantica 
Cocconeis sp, 
Radiolarians, Dr. W. R. Riedel, Scripps Institution of Ocean- 
ography, is studying the radiolarian assemblages of several samples from 
cores, 
Pollen, To find and investigate pollen Dr. Edward Smith 
Deevey, Jr., Yale University, has received a series of samples from 
two cores. 
Sediments older than Pleistocene, About 40 cores examined at 
the laboratory have been found to contain sediments which were deposited 
before the Pleistocene. One of these taken on the edge of the Blake Pla- 
teau contains foraminifera of Lower Cretaceous age, 
