(1) All cells sequential

       mostly found in unbranced nest, but some

       branched

 

(2) All cells singular

       [one per tunnel] branched nests only

 

(3) Mostly sequential cells with singular cells in 1 or 2

 tunnels

       branched nests and unbranched nests

 

(4)Mostly singular cells with sequential cells (2-3)

      branched nests only