5 Seashell I can't remember what variety it is and it is rather battle scarred but I just liked it.
6 Operculum - An operculum is a calcareous structure created by many sea snails that serves as a little “trapdoor” to safely close them inside their shell.
7 Cart-rut shell (if you look at the link below it will show you what the eggs look like that this creature laid.