In the external view (Figure 3) the bulla hides the periotic bone from without. From Wordnik.com. [Text Book of Biology, Part 1: Vertebrata] Reference
Between the ex-occipital and ali-sphenoid there is wedged in a bone, the periotic. From Wordnik.com. [Text Book of Biology, Part 1: Vertebrata] Reference
One centre of ossification in the frog forming pro-otic; several fuse together and form periotic of the dog. From Wordnik.com. [Text Book of Biology, Part 1: Vertebrata] Reference
(He described it as an outgrowth of the periotic capsule, and therefore unconnected with any visceral arch.). From Wordnik.com. [Life and Letters of Thomas Henry Huxley — Volume 2] Reference
Hidden by the bulla, and just external to the periotic bone, are the auditory ossicles, the incus, malleus, os orbiculare, and stapes. From Wordnik.com. [Text Book of Biology, Part 1: Vertebrata] Reference
In the lower forms it is a hollow membranous structure, embedded in a mass of cartilage, the otic capsule; in the mammal the latter is entirely ossified, to form the periotic bone. From Wordnik.com. [Text Book of Biology, Part 1: Vertebrata] Reference
A closer approximation to the state of the case will be reached if the student will imagine the maxilla raised up so as to overlie and hide the palatine and presphenoid, the squamosal similarly overlying the periotic bone, and the jugal reaching between them. From Wordnik.com. [Text Book of Biology, Part 1: Vertebrata] Reference
The seventh nerve (facial) is almost entirely motor; it passes through the periotic anterior to VIII., and emerges by the stylo-mastoid foramen (s.m.f.) behind the bulla, to run outside the great jaw muscle across the cheek immediately under the skin (Figure 1). From Wordnik.com. [Text Book of Biology, Part 1: Vertebrata] Reference
(1) The otic capsule (= periotic bone) of the dog ossifies from a number of centres, one of which is equivalent to the frog's prootic. From Wordnik.com. [Text Book of Biology, Part 1: Vertebrata] Reference
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