Molluscs and Annelids

Hello,

Here are some study material for the topics about Molluscs and Annelids.

And also an excerpt from Raven Biology

Big thanks to http://bioserv.fiu.edu/~biolab/labs/1011/supplemental_materials/ and http://www.mhhe.com/biosci/genbio/raven6b/graphics/raven06b/other/raven06_45.pdf.