In the following detailed description of such movements of lid member 7 relative to casing 1, it will be assumed that the movements are effected mechanically by suitable lid actuating members 13 and {HEAD ~ 14 forming part} of {TAIL ~ a recording and reproducing apparatus} and being operable when the cassette is operatively positioned within such apparatus 
In the following detailed description of such movements of lid member 7 relative to casing 1 , it will be assumed that the movements are effected mechanically by suitable lid actuating members 13 and { HEAD ~ 14 forming part } of { TAIL ~ a recording and reproducing apparatus } and being operable when the cassette is operatively positioned within such apparatus
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