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"Intercostal" on page 765, line 15, should read "intervertebral" "cancerous" on page 773, line 8, should be "cavernous"; on page 774, last line, "onward" should be inserted after "life"; "precess" on page 778, line 5, should read "process"; "spinal" should be inserted before "cord" on page 780, line 1, and "man" on page 780, line 1 of legend for figure 15, should read "woman."