. Zoology for high schools and colleges. Zoology. Fig. of the Lion. 2, occipital condyle : 7, Parietil bone and sagittal crest; 8, piroccluital; 27', squamosal bone ; 27, zygomatic arch ; 26, malar bone ; 11, frontal bone; 12, poet-orbital process; 15, nasal bone; 21, maxillary bone; 22, premaxillary biine ; .32, mandible ; 3, occipital crest; c, canine teeth ; p'^, second pre- molar ; ml, molar tooth.âAfter Owen. tain whales and porpoises. The base of the skull is perfo- rated for the exit of the nerves proceeding from the base of the brain, and the hinder bone {occiput) is perfora
. Zoology for high schools and colleges. Zoology. Fig. of the Lion. 2, occipital condyle : 7, Parietil bone and sagittal crest; 8, piroccluital; 27', squamosal bone ; 27, zygomatic arch ; 26, malar bone ; 11, frontal bone; 12, poet-orbital process; 15, nasal bone; 21, maxillary bone; 22, premaxillary biine ; .32, mandible ; 3, occipital crest; c, canine teeth ; p'^, second pre- molar ; ml, molar tooth.âAfter Owen. tain whales and porpoises. The base of the skull is perfo- rated for the exit of the nerves proceeding from the base of the brain, and the hinder bone {occiput) is perforated {fora- men magnum) for the passage of the spinal cord from the medulla oblongata. It is probable that there is a general parallelism between the head of Insects and Vertebrates. While the head of Fig. 382.âSkuIl and vl^ceial skeleton of a Selachian (diagram), occ, occipital region; la, wall of the laby- Wmged insects, for rinth ; eth, ethmoidal region ; n, nasal pit; a, flrst, 6, c, . J, second labial cartilage ; o, sunerior, n, inferior portion example, consists Ot of the mandibular arch /.; //., hyoid arch; IIL-VIII. r; â 1, i! (1-6), branchial Gegenbaur. a certain number or segments, homologous with those of the rest of the body, and with mouth-parts homologous with the limbs ; so the skull is also segmented, and an expansion and continuation of the vertebral column. Gegenbaur even maintains that the various arches of the head are homologous with the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Packard, A. S. (Alpheus Spring), 1839-1905. New York, H. Holt and Company
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
