Volvox globator

Source of the photo
http://www.google.hu/imgres?imgurl=http://www.tmbs.com/catalog/1170_c.jpg&imgrefurl=http://www.tmbs.com/catalog/fs_toc.htm&usg=__w6HXHd274-3dGFHOn5iS8Lf-eUA=&h=354&w=539&sz=31&hl=hu&start=79&um=1&itbs=1&tbnid=ECeXZ4fNjByNkM:&tbnh=87&tbnw=132&prev=/images%3Fq%3Drhodospirillum%26start%3D63%26um%3D1%26hl%3Dhu%26sa%3DN%26ndsp%3D21%26tbs%3Disch:1
Author of the description
KÖRINFO