Pinna bullata, Swainson (Fig. 168), is also a well-known species.
Gloves have been made from the byssal fibers of Pinna mixed with silk.
They are found in an oyster which is something like the pinna, only less.
Pinna, a primary division with its leaflets of a bipinnate or tripinnate leaf.
It is covered by the auricular muscles, and by the base of the pinna of the ear.
It inclines the pinna outwards; it is, accordingly, an abductor of the pinna.
We are supposing, in the description of the muscles which move it, that this pinna has its opening directed outwards.
A marked difference is noted in the size of the pinna of the ear in the various species.
Our figure of Pinna, 16, is from a young specimen: it grows to great size, and spins a very silky byssus.
The lower part of the pinna is the lobule (e), which contains no cartilage.