001 is Tellinidae, I think Tellidora.
003 is Isognomonidae. Isognomon isognomon can look like that, but there may be other possibilities.
004 is indeed Malleus.
005 Can you get a view of the hinge teeth without damaging the specimen?
Dr. David Campbell
Old Seashells
University of Alabama
Biodiversity & Systematics
Dept. Biological Sciences
Box 870345
Tuscaloosa, AL 35487 USA
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That is Uncle Joe, taken in the masonic regalia of a Grand Exalted Periwinkle of the Mystic Order of Whelks-P.G. Wodehouse, Romance at Droitgate Spa