. Anatomical technology as applied to the domestic cat; an introduction to human, veterinary, and comparative anatomy. Cats; Dissection; Mammals. THE BULLA 185. O. pmx., Os praemaxillare.—Praemaxillaxy or intermaxillary bone. § 542. Pre. par., Processus paroccipitalis—s. paramastoideus—Paramastoid or paroccipital process.—This is a curved shelf-like projection of the exoccipitai which abuts against the caudal end of the bulla. Pre. pro., Processus mastoideus—s. pars mastoidea.—Mastoid portion of the peri- oticum. Pre. z., Processus zygomaticus.—Zygomatic process of the temporal bo
. Anatomical technology as applied to the domestic cat; an introduction to human, veterinary, and comparative anatomy. Cats; Dissection; Mammals. THE BULLA 185. O. pmx., Os praemaxillare.—Praemaxillaxy or intermaxillary bone. § 542. Pre. par., Processus paroccipitalis—s. paramastoideus—Paramastoid or paroccipital process.—This is a curved shelf-like projection of the exoccipitai which abuts against the caudal end of the bulla. Pre. pro., Processus mastoideus—s. pars mastoidea.—Mastoid portion of the peri- oticum. Pre. z., Processus zygomaticus.—Zygomatic process of the temporal bone. Pre. po., Processus postorbitale.—Postorbital process of the frontal bone. § 543. Fig. 58—Preparation.—The soft parts were removed ; tlien, while the skull was yet moist, the ventral face of the hulla was ground off on a fine emery-stone. It might he removed with a watch-spring saw or on an ordinary grindstone. In grinding, the pressure should he only moderate to avoid hreaking the delicate septum. § 544. Bulla tympanica—The auditory or tympanic bulla.—The bulla is a hollow subspherical part of the 0. tympanicum enclosing the tympanum or middle ear. A delicate bony septum divides the cavity into two un- equal parts. This septum arises from the floor, and extends dorsad, but leaves a space over the fenestra ro- tunda which puts the two chambers in communication. In the lateral aspect of the bulla is the external auditory meatus (M. a. e.); attached to the octal part of this is the external ear, and to the ental part the Membrana tympani or ear drum, which completely separates the tympanum or middle ear from the exterior of the body. Flower, A, 110, and 26, 4 ; Huxley, B, 249 ; Straus-Durckheim, A, 1, 409. Cd. oc, condylus occipitalis.^—Occipital condyle. § 545. Cn. eu., Canalis Eustachiana—Eustachian canal.—This is a short bony tube leading from the tympanum to the ventral surface of the skull. Flower, A, 111. Fm. Foramen magnum, az. Fra
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