Quoting "Thomas R. Holtz, Jr." <tholtz@umd.edu>:
http://www.bris.ac.uk/news/2010/6806.html
Intriguing. Is it known why eumelanosomes (the black ones) are sausage-shaped but phaeomelanosomes (yellow to brown) are spherical?
-- **************************************************************** Nicholas J. Pharris