. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. ANATOMY OF VERTEBRATES. 101 arrangement which provides such an arch for each jtrimary divi- sion of the l:irain ; and a sentiment of admiration naturally arises on examininn- the firm interlockin"; of the extended sutural sur- faces, and especially of those uniting the proper elements of the arch with the buttresses wedged in between the piers and key- stone, and to which buttresses (diajiophyses) the larger hasmal arches are suspended. In addition to the parts of the neuroskelcton, the bones of the head include the
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. ANATOMY OF VERTEBRATES. 101 arrangement which provides such an arch for each jtrimary divi- sion of the l:irain ; and a sentiment of admiration naturally arises on examininn- the firm interlockin"; of the extended sutural sur- faces, and especially of those uniting the proper elements of the arch with the buttresses wedged in between the piers and key- stone, and to which buttresses (diajiophyses) the larger hasmal arches are suspended. In addition to the parts of the neuroskelcton, the bones of the head include the ossified part of the ear-capsule, ' petrosal,' fig. 81, 16, already mentioned; an ossified part of the eye-capsule, commonly in two pieces, ' sclerotals,' ib. 17 ; and an ossified part of the capsule of the organ of smell, ' turbinal,' ib. 19. Another assemblage of splanchnoskeletal bones support the gills, and are in the form of slender bony hoops, called ' branchial arches,' fig. 85, 48, 49. They are partly supported by the hyoidean arch. Amongst the bones of the muco-dermal system, may be noticed those that circumscribe the lower part of the orbit, fig. 75, g, f/; of which the anterior, ib. 73, is pretty constant in the vertebrate series, and is called ' lacrymal.' In fishes they are called ' subor- bitals,' and are occasionally present in great )uimbers, as, e. g., in the Tunny, or developed to enormous size as in the Gurnard, fig. 82, and allied fishes, thence called ' mail-cheeked.' A similar 82. Fore part of tlie skeleton of tiic Giiriiai-d (Trlgla Lyr«) series of bones called ' supertemporals' sometimes overarches the temporal fossa. At the outset of the study of Osteology it is essential to know well the numerous bones in the head of a fish, and to fix in the memory their arrangement and names. The latter, as we have. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance
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