These areas are particularly susceptible to saccular aneurysms. Aneurysms are typically classified by major shapes, either fusiform (tubular) or saccular (eccentric). In cases of saccular type of cyst, excision and placement of T-shaped tube is done. After the pseudoglandular stage, the lung enters the canalicular and saccular phases. Alveolar glands have a saclike secretory portion, and are also termed saccular glands. A saccular dilation in the spermatheca stores spermatozoa received from males during copulation. One of them is a saccular stage, similar to "Tetracapsuloides". In most teleost fishes it is the saccular macula that responds to sound. Their saccular spine from the left is longer than in "Oidaematophorus lithodactyla". Saccular function can be assessed by the cervical vestibular evoked myogenic potential (cVEMP). Saccular acoustic sensitivity has a variety physiological as well as mental/emotional effects. A spherical vestibule contains a large saccular otolith, which transmits vibrations to the snake's brain.