![](https://www.pdfsearch.io/img/22527375f0ae5390c9696190d91479c3.jpg) 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 wAdd to Reading ListSource URL: www.earth-science-activities.co.ukDownload Document from Source Website File Size: 51,07 KBShare Document on Facebook
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