840 
THE VOYAGE OF H.M.S. CHALLENGER,. 
pseudopodia through the pores, and mount a considerable distance up the spines ; when 
expanded in this way an Orbulina or Globigerina looks exceedingly like many of the 
Radiolaria. The yellow cells appeared to have an independent motion, as they 
were frequently observed turning about in the sarcode. Yellow cells are also present 
in Globigerina bulloides, var. triloba, Globigerina sacculifera, and Globigerina conglobata, 
but were not observed in Hastigerina, Pullenia, nor Pulvinulina. 
In all the pelagic Foraminifera there is a large nucleus which colours with carmine, 
