Echinoids Ambulacra and interambulacra D An electric bulb placed inside a large modern Echinus shows up the differences between the ambulacra and interambulacra and shows the outlines of the plates and all the pores as w

First Page		Document Content
Date: 2013-08-18 13:22:47		Echinoids Ambulacra and interambulacra D An electric bulb placed inside a large modern Echinus shows up the differences between the ambulacra and interambulacra and shows the outlines of the plates and all the pores as w Add to Reading List Source URL: www.earth-science-activities.co.uk Download Document from Source Website File Size: 51,07 KB Share Document on Facebook