ClipArt ETC
"Cidaris coronata–a common Oolitic echinoderm…showing the spines attached to tubercles on right hand." -Taylor, 1904

Cidaris coronata

"Cidaris coronata–a common Oolitic echinoderm…showing the spines attached to tubercles…

This illustration shows tubercles formed on roots of lupine by nitrogen fixing bacteria.

Tubercles

This illustration shows tubercles formed on roots of lupine by nitrogen fixing bacteria.