. Bensley's Practical anatomy of the rabbit : an elementary laboratory text-book in mammalian anatomy. Rabbits -- Anatomy. 54 ANATOMY OF THE RABBIT cavity of the nose; and additional turbinal surfaces, comprising the nasoturbinals and maxilloturbinals, are attached secondarily to the nasal and maxillary bones, the maxilloturbinals occupying only the respiratory or non-olfactory portion of the cavity. To this foundation of cartilage bones there is added a series of enclosing membrane bones, for the most part thin and superficial, but nevertheless making up the greater part of the facial portion
. Bensley's Practical anatomy of the rabbit : an elementary laboratory text-book in mammalian anatomy. Rabbits -- Anatomy. 54 ANATOMY OF THE RABBIT cavity of the nose; and additional turbinal surfaces, comprising the nasoturbinals and maxilloturbinals, are attached secondarily to the nasal and maxillary bones, the maxilloturbinals occupying only the respiratory or non-olfactory portion of the cavity. To this foundation of cartilage bones there is added a series of enclosing membrane bones, for the most part thin and superficial, but nevertheless making up the greater part of the facial portion of the head skeleton as opposed to the cranial or brain-containing portion. The series comprises a median interparietal (absent in the hare and many other mammals), paired parietal,squamosal,frontal,. mT^' Fig. 30. Composition of the mammalian skull. Cartilage dotted, cartilage bone shaded, derm bones plain: I-XII, cranial nerves; as, alisphenoid; bh, body of hyoid; bo, basioccipital; bs, basisphenoid; c, canine teeth; cm, Meckel's (mandibular) cartilage (visceral arch I): e, mesethmoid; et, ethmo- turbinal; ex, exoccipital; f, frontal; hy, hyoid (visceral arch 11); i, incisors; 1, lacrimal; m, molar teeth; mn, mandible; mx, maxilla; mt, maxilloturbinal; n, nasal; nt, nasoturbinal; os, orbitosphenoicJ; p, premaxilla; pa, parietal; pi, palatine; pm, premolar teeth; pt, pterygoid; sq, squamosal; so, supraoccipital; th, thyreohyal (visceral arch III); v, vomer; z, zygomatic. and nasal bones as roofing structures, and paired premaxillary, maxillary, palatine, pterygoid, and mandibular bones forming the solid supports of the mouth. Several lateral elements also take part, including the lacrimal, at the anterior border of the orbit, the zygomatic, forming the central portion of the corresponding arch, for protection of the orbit and for muscular support, and finally the bladder-like tympanic bone, which forms the enclosure of the middle ear and protects the delicate bones of the aud
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