Sorry, it was a typo (faute de frappe). What the girl wrote is that
Littorina neritoides has two systems to breath a branchia when it's
under water and a lung when it's out. Is it right ?

Sophie


>brachia means an arm, but branchia, which appears to be the word you are
>looking for, means a gill.  Therefore the breathing mechanism consists
>of a lung and a gill.
>
>Paul M.

>>Hello,
>>
>>I'm reading a book where the author mention the existence in
>>Littorina neritoides of a lung and a branchia (poumon et branchie). Is
>>it right ? I must confess my complete ignorance in gastropod's
>>anatomy.
>>Thank's in advance,
>>
>>Sophie