This C. elegans data was downloaded from the Wormbase site:

ftp://ftp.sanger.ac.uk/pub/wormbase/WS100/CHROMOSOMES/

      Name                    Last modified      Size  Description
Parent Directory - database/ 2013-10-01 12:48 - waba/ 2008-06-25 11:52 - chromosomes/ 2008-06-25 11:52 - alignments/ 2008-06-25 11:52 -