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 McGill University 
 Montreal 
 
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 ANOMALOUS MUSCLE OF THE THORAX, CONNECTED 
 WITH THE DIAPHRAGM. By Francis J. Shepherd, 
 M.D., Profesmr of Anatomij in M'Gill University, Montreal. 
 
 In a well developed male subject which was dissected during last 
 winter was found the following muscle : — 
 
 On removing the left lung and parietal pleura, a long flat ribbon- 
 shaped muscle was seen running down the left side of the bodies of 
 the dorsal vertebrae ; it arose from the anterior surface of the head of 
 the sixth and seventh ribs, near the vertebral articulation, by a fleshy 
 origin half a centimetre wide. As the muscle descended it became 
 broader, until it reached a width of two and one-half centimetres. It 
 ended in two slips, the most posterior becoming tendinous, and then 
 acfain muscular, blended finally with the lesser arcuate ligament of the 
 left side ; the anterior slip, which was muscular to its termination, but 
 had a tendinous intersection, was continued with the left crus of the 
 diaphragm, becoming blended with it. 
 
 Anomalous muscles connected with the diaphragm are rare, and I 
 have been unable to discover a case similar to the one above described. 
 The significance of this muscle I am at a loss to determine. Might it 
 not be a remnant of what Prof. Sir Geo. Humphry calls the suh- 
 vertebral rectus which is found in the Japanese salamander, of 
 which the crura .i" the diaphragm forms the lumbar remnant in 
 mammals t