11.   In contrast, in some species the egg shell is very thin and may be merely present as a sheath around the larva.

12.   Last year a cache of Second World War shells were unearthed on the site of what had previously been a scrap yard.

13.   As I tiptoed down the hall an ugly idea occurred to me - what if there was no shell in the chamber?

14.   At the last minute, the tart shells are filled and baked.

15.   A clear shell of PVC is the hippest choice, one of brown wool is more traditional, and a denim shell offers a casual street look.

16.   A cash shell is a company with no assets except cash.

17.   A private investigator once wanted several documents shredded, although there were bullet shells taped to the paper.

18.   Add lobster pieces, and sear them over high heat, turning often, until the shells are bright red.

19.   Add the prawn shells and pepper and continue to saute until the shells are fragrant and almost beginning to burn.

20.   But are some shells too tough to crack?