. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 646 SKELETON. thoracic rib, invites the reason to name all these pieces as costiform, wherefore should Fig. The cervical spine of the Ornithorhynchus, Showing that b the eoracoid bone, d the clavicle, and e the sternal end of the rib, are serial homo- logues. we not regard the pieces 1,2,3,4,5, con- tinued serially into the rib of 6, as being cos- tiform likewise, despite the fact that anato- mists have already regarded the pieces 1 and 2 as the eoracoid and clavicular bones ? Do we not see in fig. 469. that the p
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 646 SKELETON. thoracic rib, invites the reason to name all these pieces as costiform, wherefore should Fig. The cervical spine of the Ornithorhynchus, Showing that b the eoracoid bone, d the clavicle, and e the sternal end of the rib, are serial homo- logues. we not regard the pieces 1,2,3,4,5, con- tinued serially into the rib of 6, as being cos- tiform likewise, despite the fact that anato- mists have already regarded the pieces 1 and 2 as the eoracoid and clavicular bones ? Do we not see in fig. 469. that the parts 1, 2, 3, 4, 5 point to the parts a, b, c, d, e, just as the part 6 points to the part/? If it be said that the parts 1 and 2 (the eoracoid and clavicle), being disconnected from the cervical ribs (a and b) are therefore to be regarded as quantities unrelated originally to a, b, I must doubt whether this can efface from the rational mind the belief that the now separated pieces a, 1 or b, 2, taken as whole quantities, equal the costo-sternal formf, 6. Whether or not the above-mentioned interpretation as to the origin of the bones called clavicle and eoracoid be true, must be seen through the facts as they are here recorded: but be this interpretation as it may, I plainly affirm that the comparative anatomist has no positive evidence, near or remote, directly or indirectly, either by a similarity of structure, or function, or po- sition, or aught else, to regard the cora- F-ig. 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 Todd, Robert Bentley, 1809-1860. London, Sherwood, Gilbert, and Piper
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