Besides, there are the products of the interstitial cells, the creations of a special layer of cells around the ovum, the membrana granulosa.

Membrana Tympani.

The Jews of old examined their maids ex tenui membrana, called Hymen, which Laurentius in his anatomy, Columbus lib. 12.

The intermediate ear displays an irregular cavity, having a membrane, called the membrana tympani, stretched across its extremity; and this cavity has a communication with the external air, through the Eustachian tube, which leads into the fauces, or throat.

Capite depresso; membrana tympani aperta.

Testa in ipsa basi acutiuscula foramine minuto perforata: Membrana interna respectu testae inversa, hujusce nempe apici lata basi inserta, ovata apice angustato aperto foramen testae obturante: Nucleus cavitate membranae conformis, ejusdem basi insertus, caeterum liber, pulposus solidus, apice acutiusculo laevi aperturam membranae internae attingente.

Membrana branchialis radiis sex sustentata, interoperculis liberis, accumbentibus tecta.